Advancing Neutrosophic Topology through Gamma Generalized Alpha Closed Sets
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Neutrosophic Sets and Systems, Vol. 98, 2026 University of New Mexico Neutrosophic πΈ generalized Ξ± closed sets and its Properties.B.Kalaiselvi ,K.Sivakumar,P.Kalarani, S.Chandrasekarand A.kesavan Advancing Neutrosophic Topology through Gamma Generalized Alpha Closed Sets B.Kalaiselvi 1, K.Sivakumar 2*, S.Chandrasekar 3,P.Kalarani4 and A.Kesavan5 1 Department of Mathematics , Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai, India, 602105 ,e-mail: [email protected] 2 Department of Mathematics, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai, India, 602105 , e-mail: sivakumarkaliappan.[email protected] 3 Department of Mathematics, Arignar Anna Government Arts College, Namakkal (DT), Tamil Nadu, India e-mail: [email protected] 4 Department of Mathematics,Tagore Engineering College, Chennai, India, 602105, e-mail: [email protected] 5 Department of Mathematics, Tagore College of Arts and Science,Tamil Nadu, India e-mail: [email protected] * Correbondence: [email protected] Abstract: This paper introduces a novel class of Neutrosophic closed sets called Neutrosophic πΎ - generalized πͺ -closed sets (Ne.(πΎG πͺ )CS), along with their corresponding open sets (Ne.(πΎG πͺ )OS), within the structure of Neutrosophic Topological Spaces (NTS). The motivation for this study arises from the limitations observed in existing Neutrosophic closed sets such as πͺ -closed, semi-closed, and πΎ -closed sets, which often lack the flexibility to model hybrid structures involving partial membership and indeterminacy. To address this gap, we define the Ne.(πΎG πͺ )CS using π«-closure operators and Ξ±-open supersets, offering a broader framework that unifies and extends several earlier concepts. The proposed sets are systematically analyzed through formal claims, and their behavior is demonstrated using counterexamples to confirm that reverse implications do not generally hold. Additionally, we explore their algebraic properties including union, intersection, and inclusion relationships. A comparative analysis illustrates how these sets generalize previously defined structures while preserving essential topological characteristics. The findings not only contribute to the advancement of Neutrosophic set theory but also offer a solid foundation for further research in uncertainty modeling, generalized topology, and decision-making systems. This work enhances the expressiveness of Neutrosophic topology and opens potential pathways for practical applications in fields requiring nuanced treatment of imprecision. 1. Introduction and Preliminaries In recent decades, the limitations of classical set theory in handling real-world uncertainty have driven the development of more generalized mathematical frameworks. Among these, Smarandacheβs Neutrosophic Set theory stands out as a significant advancement . This enables the representation of uncertain, incomplete, inconsistent, and vague information with greater flexibility. Building on this foundation, Neutrosophic Topology emerged as a natural extension of classical topology into the domain of indeterminacy. This new branch was initiated by A.A. Salama [10], who developed the concept of Neutrosophic Topological Spaces (NTS). In these spaces, the classical notions of open and closed sets are redefined to accommodate the presence of indeterminate and inconsistent information, which is especially relevant in areas such as artificial intelligence, decision support systems, and data analysis. Since the introduction of NTS, many researchers have contributed to its advancement by proposing various types of Neutrosophic open and closed sets. These generalized forms have helped to build a more complete understanding of topological structures under uncertain conditions. For example, Arokiarani I. and colleagues [2] proposed the notion of Neutrosophic Ξ±-CS, which broadened the traditional concept of closedness in topological spaces by integrating indeterminacy and partial membership. Their work added depth to the exploration of closure operations in generalized topologies.
Neutrosophic Sets and Systems, Vol. xx, 20xx 22 Neutrosophic πΈ generalized Ξ± closed sets and its Properties.B.Kalaiselvi ,K.Sivakumar,P.Kalarani, S.Chandrasekarand A.Kesavan Similarly, Ishwarya P. et al. [7] studied Neutrosophic Semi-Open Sets, which represent a hybrid category between open and closed sets. This intermediate classification has provided new insights into how Neutrosophic sets behave with respect to topological boundaries, particularly when information is incomplete or partially defined. Despite these advancements, existing classifications may not fully capture the intricate relationships between different types of Neutrosophic sets. To address this gap, the present study introduces a novel class of closed sets, termed Neutrosophic πΎ-Generalized Ξ± -Closed Sets (abbreviated as Ne.(πΎG πͺ )CS, along with their corresponding open sets, known as Neutrosophic Ξ³\gamma-Generalized Ξ±\alpha-Open Sets (Ne.(πΎG πͺ )CS). These newly defined set classes are proposed to further refine and generalize the concepts of closure and openness in Neutrosophic Topological Spaces. The key idea is that a set Ξ1 in a Neutrosophic topological space (ππ«π’.,Ne.Ο) is said to be a Ne.(πΎG πͺ )CS if ππ.bcl(Ξ1) ο Ξ© whenever Ξ1οΞ© and Ξ© is a Neutrosophic πͺ - alpha-Open Set in the same space. This framework incorporates both the πΎ-closure and Ξ±\alpha-openness concepts, leading to a more layered and flexible understanding of set boundaries. By doing so, it bridges the gap between multiple earlier notions and offers a unified structure to study more complex topological behaviors under uncertainty. The objective of this research is threefold: β’ To formally define and introduce the new classes of Ne.(πΎG πͺ )CS closed and open sets; β’ To analyze and prove their fundamental properties, including behavior under standard set operations like union, intersection, and complement; β’ To explore their relationships with existing types of Neutrosophic sets, such as N(Ξ±\alpha)CS, N(G)CS, and N(GS)CS. By addressing these goals, this paper aims to contribute both theoretical and structural value to the growing domain of Neutrosophic topology. These developments have the potential to enhance future investigations in topology, logic, and their interdisciplinary applications. Moreover, this study lays the groundwork for further exploration into continuity, compactness, and separation axioms using the newly defined set types. It also opens the possibility for practical applications where vague, incomplete, or inconsistent information must be systematically analyzed. In conclusion, the introduction of Neutrosophic πΎ βGeneralized πͺ -Closed and Open Sets represents a significant step forward in the evolution of Neutrosophic topology. It offers refined tools for topological analysis in the presence of indeterminacy and strengthens the theoretical foundation for further research in uncertainty modeling and applied mathematics. 1.1 Motivation for the Study Many real-life problems involve situations where things are not fully true or false, and we face uncertainty or incomplete information. Traditional set theories like classical sets or fuzzy sets cannot properly deal with this kind of uncertainty. To solve this, Neutrosophic Set Theory was introduced, which allows us to separately consider truth, falsity, and indeterminacy. Building on this idea, Neutrosophic topology was developed to study open and closed sets in uncertain environments. Several types of Neutrosophic closed sets already exist, like πͺ , πΎ and semiCS. But these sets often work separately and donβt give a complete picture when openness and closeness overlap. They are not flexible enough to handle all types of uncertain or mixed cases. This creates a need for a new, more general type of set that can combine and extend the features of the
Neutrosophic Sets and Systems, Vol. xx, 20xx 23 Neutrosophic πΈ generalized Ξ± closed sets and its Properties.B.Kalaiselvi ,K.Sivakumar,P.Kalarani, S.Chandrasekarand A.Kesavan existing ones. Thatβs why this paper introduces a new kind of set called the Neutrosophic πΎ-generalized πͺ - closed set, which is designed to be broader and more useful in dealing with complex uncertain situations. 1.2 Research Gap Although several classes of Neutrosophic closed sets have been introduced in recent yearsβsuch as Neutrosophic πͺ -closed sets, semi-closed sets, pre-closed sets, and πΎ-closed setsβthese concepts are limited in scope. Most of them address specific types of closure behavior and do not offer a unified structure that combines multiple closure and openness properties. As a result, they fall short in representing more complex topological structures that may arise in uncertain systems. Another issue is that the relationships between these different types of Neutrosophic closed sets are not fully explored in the literature. There is a lack of generalized set definitions that can include these existing types as special cases while offering new insights into how they interact or differ. Additionally, many existing models do not account for how sets behave under different closure operations, such as semi-closure or π«-closure, in a combined or comparative manner. Therefore, there is a clear gap in developing a broader class of Neutrosophic closed sets that can generalize and unify various existing structures under a single theoretical framework. This limitation inspires the introduction and investigation of Neutrosophic πΎ-generalized -generalized πͺ -CS in the present study. 1.3 Objective of this study The main aim of this research is to introduce and explore a novel category of closed sets in Neutrosophic topology, referred to as Neutrosophic Ξ³ -generalized πͺ -CS (Ne.(Ξ³Gπͺ)CS). This class is introduced to generalize and unify several existing Neutrosophic closed set types, such as Ξ±-closed, semi-closed, pre-closed, and πΎ -closed sets, under a broader and more inclusive framework. The study aims to establish the foundational properties of Ne.(πΎG πͺ )CS, examine their algebraic behavior, and explore their interactions with other wellknown closed sets. In addition, the paper provides formal proofs and counterexamples to demonstrate that while Ne.(πΎG πͺ )CS include many existing classes as special cases, the reverse inclusions do not hold. Another key objective is to introduce the corresponding open sets, namely Neutrosophic πΎ -generalized πͺ -open sets, and investigate their characteristics. Through this work, the paper seeks to enrich the structure of Neutrosophic topological spaces and support further theoretical development and practical application in fields that require refined treatment of uncertainty and imprecision. 1.4 Discussion of Existing Problems and Core Contributions The study addresses a key limitation in Neutrosophic topologyβnamely, the lack of a unified structure that can generalize and relate various existing Neutrosophic closed sets such as πͺ -closed, semi-closed, preclosed, and πΎ-CS. These earlier set types are defined in isolated contexts and are often insufficient for representing the complex interplay between openness and closedness in uncertain systems. They do not capture all types of boundary behaviors, nor do they offer a general framework that allows comparison or inclusion among multiple closure concepts. In response to this limitation, the paper introduces a new and more inclusive class called Neutrosophic πΎgeneralized πͺ -closed sets (Ne.(πΎG πͺ )CS), which incorporates π«-closure operations with Ξ±-open supersets. This framework not only generalizes several known classes of Neutrosophic closed sets but also establishes their interrelationships through a series of logical claims. The paper rigorously proves that (Ne.(πΎG πͺ )CS)
Neutrosophic Sets and Systems, Vol. xx, 20xx 24 Neutrosophic πΈ generalized Ξ± closed sets and its Properties.B.Kalaiselvi ,K.Sivakumar,P.Kalarani, S.Chandrasekarand A.Kesavan includes all of these earlier classes as special cases and presents counterexamples to show that the converse is not generally true. This distinction is crucial for deepening the theoretical structure of Neutrosophic topology. The core contributions of the paper are as follows: β’ Formal definition and development of the new class (Ne.(πΎG πͺ )CS)and its corresponding open set (Ne.(πΎG πͺ )OS). β’ Establishment of inclusion relationships between (Ne.(πΎG πͺ )CS)and existing Neutrosophic closed sets ( πͺ -closed, semi-closed, πΎ-closed, etc.). β’ Presentation of multiple claims supported by proofs and counterexamples to clarify boundary conditions. β’ Analysis of set operations (such as union and intersection) on (Ne.(πΎG πͺ )CS)and their closure properties. β’ Introduction of generalization theorems showing how (Ne.(πΎG πͺ )CS) can serve as a broader framework for future topological investigations. By resolving the fragmented nature of existing closed set definitions and offering a unified approach, this work significantly enhances the expressive power of Neutrosophic topological structures and provides a solid foundation for further applications and theoretical extensions. 1.5 Proposed Methodology This study adopts a theoretical methodology to define and explore a new class of closed sets in Neutrosophic Topological Spaces (NTS), called Neutrosophic πΎ-generalized πͺ -closed sets (Ne.(πΎG πͺ )CS). The method begins with a review of existing closed set typesβsuch as πͺ -closed, semi-closed, pre-closed, and πΎclosed setsβto highlight the need for a unifying structure. The new class is defined using Ξ²-closure and πͺ - open sets: a set Ξ1 is (Ne.(πΎG πͺ )CS) if its π« -closure is contained in every πͺ -open superset that includes it. Several claims are then established to show that well-known Neutrosophic closed sets are special cases of (Ne.(πΎG πͺ )CS), with counterexamples demonstrating that the converse is not generally true. Illustrative examples clarify the behavior of these sets, including their response to set operations like union and intersection. The study also introduces the corresponding open set class, Neutrosophic πΎ -generalized πͺ -open sets (Ne.(πΎG πͺ )OS), and explores their properties. Overall, this methodology provides a step-by-step generalization framework that strengthens and extends the theory of Neutrosophic topology. The rationale for selecting a theoretical and axiomatic approach in this study stems from the need to generalize and unify multiple existing classes of Neutrosophic closed sets within a single framework. Traditional Neutrosophic closed setsβsuch as πͺ -closed, semi-closed, pre-closed, and πΎ-closed setsβare defined independently and lack a shared structure that allows for direct comparison or integration. By employing π« -losure and Ξ±-open set operations, the proposed Neutrosophic πΎ-generalized πͺ - closed sets (Ne.(Ξ³G πͺ )CS) offer a flexible yet rigorous extension that includes these existing sets as particular cases. This formal method ensures mathematical clarity, enables the derivation of inclusion relations, and allows the formulation of claims with both proofs and counterexamples. The goal was to address the structural gaps in current Neutrosophic topology and to enrich the theoretical landscape for future developments. The selected methodology thus
Neutrosophic Sets and Systems, Vol. xx, 20xx 25 Neutrosophic πΈ generalized Ξ± closed sets and its Properties.B.Kalaiselvi ,K.Sivakumar,P.Kalarani, S.Chandrasekarand A.Kesavan provides a solid foundation for extending closure-based reasoning under uncertainty and lays the groundwork for potential applications in decision theory, data analysis, and soft computing. 2. Basic Definitions and Preliminaries Definition 2.1 [5,6] Consider a fixed non-empty set NX. A Neutrosophic set V1 β defined on NX can be expressed as V1 β= {β©x,ΞΌV1 β(x),ΟV1 β(x),Ξ½V1 β(x)βͺ|x β N x },where ΞΌV1 β(x):The membership degree is denoted by NXβ, and the function Ξ½V1 β(x):NXβ[0,1] specifies the non-membership degree for the Neutrosophic set V1 β, whereas ΟV1 β(x), represents the indeterminacy degree. Definition 2.2 [10] A Neutrosophic topology (abbreviated as NT) on the set Nx defined as a collection NΟof Neutrosophic sets within Nx that satisfies the following conditions: 1. The null Neutrosophic set 0N and the universal Neutrosophic set 1N are elements of NΟ 2. The intersection J1β©J2 belongs to NΟfor any two sets J1,J2β NΟ 3. For any collection {Ji|i β j}β NΟ. In this situation, the couple (NX,NΟ)(NX,NΟ) is denoted to as a NTS. A NOS is any subclass of NX that fits to NΟ. The counterpart V1 βc of a NOS V1 β in the NTS (NX,NΟ) is recognized as a NCS in NX.. Claim 2. 3 [10]. For any NS V1 β in (NX,NΟ), we have 1. Nint(0N)= 0N and Ncl(0N)= 0N 2. (Nint(V1 β))c= Ncl(V1 βc) 3. (Ncl(V1 β))c= Nint(V1 βc) 4. Nint(1N)= 1N and Ncl(1N)= 1N Definition 2.4 A NS V1 βof a NTS (NX,NΟ) is a 1. A Neutrosophic semi preclosed set (denoted as (N(Ξ³)CS) is well-defined as a set V1 β for which βan N(P) closed set V2 β in N(P) Closed set and there exists a Neutrosophic preclosed set V2 β in which contains the neutrosophic interior of V2 β contains V1 β. 2. In [15] (N(Ξ³)OS β N(P)OS V2 β such that V1 ββ(V1 β)β Ncl(V2 β)V1 β Definition 2.5 Let V1 βbe an NS of a NTS (NX,NΟ). Then 1. NΞ±cl(V1 β)=β©{I|I is a N(Ξ±)CS in NX and V1 ββ I} 2. NΞ±int(V1 β)=βͺ{I|I is a N(Ξ±)OS in NX and I β V1 β} Definition 2.6 Let V1 β be a Neutrosophic set (NS) in the Neutrosophic Topological Space (NTS) (NX,NΟ). Then: V1 β is called a Neutrosophic Generalized Closed Set (abbreviated as N(G)CS if Ncl(V1 β)β Ξ¨ whenever V1 ββ Ξ¨ is a Neutrosophic Open Set (NOS) in NX.. 1. V1 β is called a Neutrosophic Generalized Semi Closed Set (abbreviated as N(GS)CS if Ncl(V1 β)β Ξ¨ where Ξ¨ is a NOS in NX.
Neutrosophic Sets and Systems, Vol. xx, 20xx 26 Neutrosophic πΈ generalized Ξ± closed sets and its Properties.B.Kalaiselvi ,K.Sivakumar,P.Kalarani, S.Chandrasekarand A.Kesavan 2. V1 βis called an Alpha-Neutrosophic Generalized Closed Set (abbreviated as (N(Ξ±)GCS if Ncl(V1 β)β Ξ¨, and Ξ¨ is a NOS in NX.. 3. V1 β is called a Neutrosophic Generalized Alpha Closed Set (abbreviated as (N(Ξ±)GCS if Ncl(V1 β)β Ξ¨, and Ξ¨ is a Neutrosophic Alpha Open Set (NΞ±OS) in NX Remark 2.7 Let V1 β be a NS in (NX,NΟ). Then 1. NSβcl(V1 β)= V1 ββ©Nint(Ncl(V1 β)) 2. NSβint(V1 β)= V1 ββͺNcl(Nint(V1 β)) If V1 β is a NS of NX then NScl(V1 βc)= (NScl(V1 β))c 3. (ππ.( πππ)ππ)- Neutrosophic Ξ³ generalized Ξ± - CS Definition 3.1 A Neutrosophic set Ξ1 in the Neutrosophic Topological Space (ππ«π’.,Ne.Ο) is called a Neutrosophic (Ne.( Ξ³GΞ±)CS) if ππ.bcl(Ξ1) ο Ξ© wheneverΞ1οΞ©and Ξ© is a Ne.(Ξ±)OS in (ππ«π’.,Ne.Ο) in the space Ne.TS (ππ«π’.,Ne.Ο). . Example 3.2: Let ππ«π’. ={s1 β,s2 β}, K1 β=β©x,(5 10,5 10,5 10),(5 10,5 10,5 10)βͺ,and K2 β=β©x,(4 10,5 10,6 10),(3 10,5 10,7 10)βͺ. Then ππ«π’. = {0N,K1 β,K2 β,1N} is a ππ.T on ππ«π’.. Here Ξ1 =β©x,(3 10,5 10,7 10),(2 10,5 10,8 10)βͺ stands an ππ.π in (ππ«π’., ππ.Ο). Claim 3.3: In the space (ππ«π’.,ππ.Ο) every ππ.CS is also aππ.( Ξ³GΞ±)CS but the converse does not generally hold. Proof: Assume Ξ1 is a ππ. Closed set in ππ«π’. suppose Ξ1ο Ξ© where Ξ© is a ππ.(πΌ) openset in ππ«π’.. As given that ππ.πππ(Ξ1)ο ππ.cl(Ξ1)= Ξ1ο Ξ© is follows that Ne.bcl(Ξ1) ο Ξ©. Then Ξ1 is in the space (ππ«π’.) with the neutrosophic topology ππ.Ο and is a a ππ.(ππΊπΌ) Illustration 3.4: Let Οπ«π’. ={s1 β,s2 β}, K1 β=β©x,(5 10,5 10,5 10),(5 10,5 10,5 10)βͺ and K2 β=β©x,(4 10,5 10,6 10),(3 10,5 10,7 10)βͺ. Then Οπ«π’. = {0N,K1 β,K2 β,1N} is a Ne.T on ππ«π’.. Here Ξ1 =β©x,(3 10,5 10,7 10),(2 10,5 10,8 10)βͺ is a neutrosophic topology is in (ππ«π’. , Ne.Ο), is a neutrosophic topology ( Ξ³GΞ±) closed set nonetheless non Ne.closed in (ππ«π’. , Ne. Ο) as Ne.cl(Ξ1)= K1 βC β Ξ1. Claim 3.5: In the space (ππ«π’., ππ.Ο) every ππ.(π)πΆπ is also ππ.(ππΊπΌ)πΆπ but the converse does not generally hold. Proof:
Neutrosophic Sets and Systems, Vol. xx, 20xx 27 Neutrosophic πΈ generalized Ξ± closed sets and its Properties.B.Kalaiselvi ,K.Sivakumar,P.Kalarani, S.Chandrasekarand A.Kesavan Let Ξ1 be a Ne.SCS in ππ«π’. . Let Ξ1ο Ξ© and Ξ© is a Ne.(Ξ±)OS in ππ«π’. . As Ne.(Ξ³)cl(Ξ1)ο Ne.(S)cl(Ξ1)= Ξ1ο Ξ© by hypothesis, we have Ne.(Ξ³)cl(Ξ1)ο Ξ©. Then Ξ1 is a Ne.( Ξ³GΞ±)CS in (ππ«π’., NΟ). Illustration 3.6: Let Οπ«π’. ={s1 β,s2 β}, K1 β=β©x,(5 10,5 10,5 10),(5 10,5 10,5 10)βͺ and K2 β=β©x,(4 10,5 10,6 10),(3 10,5 10,7 10)βͺ. Then Οπ«π’. = {0N,K1 β,K2 β,1N} is a Ne.T on ππ«π’.. Here Ξ1 =β©x,(3 10,5 10,7 10),(2 10,5 10,8 10)βͺ is a Ne.s in (ππ«π’., Ne.Ο), stands a neutrosophi ( Ξ³GΞ±) closed set nevertheless non a Ne.(S) closed set in ( ππ«π’. , NΟ) as ππ.πππ‘(ππ.ππ(Ξ1))= ππ.int(K1 βC)= K1 β β Ξ1. Claim 3.7 Every Neutrosophic Ne.(π) Closed Set in the space(π, ππ.Ο) is also a Neutrosophic N( Ξ³GΞ±) Closed Set, In general, however, the converse is not necessarily true. Proof: Let Ξ1 is a Ne.(P)CS in ππ«π’.. Let Ξ1ο Ξ© and Ξ© is a Ne.(Ξ±)OS in ππ«π’.. As Ne.(Ξ³)cl(Ξ1)ο Ne.(P)cl(Ξ1) =Ξ1ο Ξ© by hypothesis, we have Ne.(Ξ³)cl(Ξ1)ο Ξ©. Then Ξ1 is a Ne.( Ξ³GΞ±)CS in (ππ«π’., NΟ). Illustration 3.8: Let Οπ«π’. ={s1 β,s2 β}, K1 β=β©x,(5 10,5 10,5 10),(6 10,5 10,4 10)βͺ and K2 β=β©x,(4 10,5 10,6 10),(3 10,5 10,7 10)βͺ. Then Οπ«π’. = {0N,K1 β,K2 β,1N} is a Ne.T on ππ«π’.. Here Ξ1 =β©x,(3 10,5 10,7 10),(2 10,5 10,8 10)βͺ is a Ne.s in (ππ«π’., Ne.Ο), stands a Ne.(ππΊπΌ)πΆπ nevertheless not anNe.(π)πΆπ in (ππ«π’., NΟ) as ππ.ππ(ππ.πππ‘(Ξ1)) = ππ.ππ(K2 β) = K1 βC β π¬1. Claim 3.9: Every Neutrosophic πΌ Closed Set in the space (ππ«π’., ππ.Ο) is also a Neutrosophic ππ.(ππΊπΌ) Closed Set, but the converse is not true in general. Proof: Let Ξ1 is a Ne.(Ξ±)CS in ππ«π’.. Let Ξ1οΞ© and Ξ© is a Ne.(Ξ±)OS in ππ«π’.. As Ne.(Ξ³)cl(Ξ1) ο Ne.(Ξ±)cl(Ξ1) = Ξ1οΞ© by hypothesis, we have Ne.bcl(Ξ1) ο Ξ©. Therefore, in (ππ«π’., Ne.Ο)., Ξ1 is a Ne.( Ξ³GΞ±)CS. Illustration 3.10: Let Οπ«π’. ={s1 β,s2 β}, K1 β=β©x,(5 10,5 10,5 10),(5 10,5 10,5 10)βͺ and K2 β=β©x,(4 10,5 10,6 10),(3 10,5 10,7 10)βͺ. Then Οπ«π’. = {0N,K1 β,K2 β,1N} is a Ne.T on ππ«π’.. Here Ξ1 =β©x,(3 10,5 10,7 10),(2 10,5 10,8 10)βͺ is a Ne.s in (ππ«π’., Ne.Ο), stands a Neutrosophicππ.(ππΊπΌ closed set nevertheless non an ππ.(πΌ)πΆπ in (ππ«π’., ππ.Ο) as ππ.ππ(ππ.πππ‘(ππ.ππ(π¬1))) = ππ.ππ(ππ.πππ‘(K1 βC)) = ππ.cl(K1 β) = K1 βC β π¬1. Claim 3.11:
Neutrosophic Sets and Systems, Vol. xx, 20xx 28 Neutrosophic πΈ generalized Ξ± closed sets and its Properties.B.Kalaiselvi ,K.Sivakumar,P.Kalarani, S.Chandrasekarand A.Kesavan Every Neutrosophic Ξ³β Closed Set in the space (ππ«π’., Ne.Ο) is also a Neutrosophic Ne.( Ξ³GΞ±) Closed Set, but the converse does not hold in general Proof: Let Ξ1 Neutrosophic Ξ³β Closed Set in the space (ππ«π’.). Let Ξ1οΞ© and Ξ© is aNeutrosophicβ Ξ± open set in ππ«π’.. while Ne.(Ξ³)cl(Ξ1) οNe. (Ξ³)cl(Ξ1) = Ξ1 ο Ξ© by hypothesis, here consume Ne.(Ξ³)cl(Ξ1) ο Ξ©. Therefore, in (ππ«π’., Ne.Ο)., Ξ1 is a Neutrosophic ( Ξ³GΞ±) closed set. Illustration 3.12: Let Οπ«π’. ={s1 β,s2 β}, K1 β=β©x,(5 10,5 10,5 10),(3 10,5 10,7 10)βͺ and K2 β=β©x,(4 10,5 10,6 10),(3 10,5 10,7 10)βͺ. Then Οπ«π’. = {0N,K1 β,K2 β,1N} is a Ne.T on ππ«π’.. Here Ξ1 =β©x,(4 10,5 10,4 10),(6 10,5 10,4 10)βͺ is a Ne.s in (ππ«π’., Ne.Ο), stands a Neutrosophic Ne.( Ξ³GΞ±) closed set but non an Ne.(b) closed set in (ππ«π’. , Ne.Ο) as Ne.int(Ne.cl(Ξ1))β© Ne.cl(Ne.int(Ξ1)) =K1 ββ©K1 βC = K1 ββ Ξ1 . Claim 3.13: Every Neutrosophic ππ.(π
) Closed Set in the space in (ππ«π’., ππ.Ο) is also a Neutrosophic ππ.(ππΊπΌ) Closed Set, but the converse is not generally true. Proof: Let Ξ1 is a Ne.(R)CS in ππ«π’.. Since every Ne.(R)CS is a Ne.CS., Ξ1 is a Ne.CS. Therefore by claim 2.3, Ξ1 is a Ne.( Ξ³GΞ±)CS in (ππ«π’., NΟ). Illustration 3.14: Let Οπ«π’. ={s1 β,s2 β}, K1 β=β©x,(5 10,5 10,5 10),(6 10,5 10,4 10)βͺ and K2 β=β©x,(4 10,5 10,6 10),(3 10,5 10,7 10)βͺ. Then Οπ«π’. = {0N,K1 β,K2 β,1N} is a Ne. T on ππ«π’. .Here Ξ1 =β©x,(4 10,5 10,6 10),(3 10,5 10,7 10)βͺ is a Ne. ( Ξ³GΞ±)CS but not an Ne.(R)CS in (ππ«π’., Ne.Ο) as Ne.cl(Ne.int(Ξ1)) = Ne.cl(K2 β) = K1 βC β Ξ1. Claim 3.15: Every Neutrosophic ππ.(Ξ³)Closed Set in the space (ππ«π’., ππ.Ο) is also a Neutrosophic ππ.(ππΊπΌ) Closed Set; however, the converse does not necessarily hold. Proof: Let Ξ1 be a Ne.(Ξ³)CS in ππ«π’.. Let Ξ1 ο Ξ© and Ξ© is a Ne.(Ξ±)OS in ππ«π’.. As Ne.bcl(Ξ1) ο Ne.(Ξ³)cl(Ξ1) = Ξ1 ο Ξ© by hypothesis, we have Ne.(Ξ³)cl(Ξ1) ο Ξ©. Therefore, in (ππ«π’., Ne.Ο)., Ξ1 is a Ne.( Ξ³GΞ±)CS. Illustration 3.16:
Neutrosophic Sets and Systems, Vol. xx, 20xx 29 Neutrosophic πΈ generalized Ξ± closed sets and its Properties.B.Kalaiselvi ,K.Sivakumar,P.Kalarani, S.Chandrasekarand A.Kesavan Let Οπ«π’. ={s1 β,s2 β}, K1 β=β©x,(5 10,5 10,5 10),(3 10,5 10,7 10)βͺ and K2 β=β©x,(4 10,5 10,6 10),(3 10,5 10,7 10)βͺ. Then Οπ«π’. = {0N,K1 β,K2 β,1N} is a Ne. T on ππ«π’. . Here Ξ1 =β©x,(4 10,5 10,4 10),(6 10,5 10,4 10)βͺ is a Ne.( Ξ³GΞ±)CS but not a Ne.(Ξ³)CS in (ππ«π’., Ne.Ο), as we could not find any Ne.(P)CS Ξ2 such that Ne.int(Ξ2) ο Ξ1 ο Ξ2 in ππ«π’.. Claim 3.17: Every Neutrosophic ππ.(π) Closed Set in the space (ππ«π’., ππ.Ο) is also a Neutrosophic ππ.(ππΊπΌ) Closed Set, but the converse is not true in general. Proof: Let Ξ1 is a ππ.(π)πΆπ in ππ«π’.. Let Ξ1 ο Ξ© and Ξ© is a ππ.(πΌ)ππ in ππ«π’.. Now ππ.(πΎ)cl(Ξ1)=Ξ1οΞ©, by hypothesis. Therefore we have ππ. (π)ππ(Ξ1)οΞ©. Hence Ξ1 is a ππ.(ππΊπΌ)πΆπ in (ππ«π’., ππ.Ο). Illustration 3.18: Let ππ«π’. ={s1 β,s2 β}, K1 β=β©x,(5 10,5 10,3 10),(5 10,5 10,7 10)βͺ, and K2 β=β©x,(4 10,5 10,6 10),(3 10,5 10,7 10)βͺ. Then ππ«π’. = {0N,K1 β,K2 β,1N} is a ππ. T on ππ«π’. . Here Ξ1 =β©x,(4 10,5 10,4 10),(6 10,5 10,4 10)βͺ is a ππ.(ππΊπΌ)πΆπ but not an ππ.(π)πΆπ in (ππ«π’., ππ.Ο) as ππ.πππ‘(ππ.ππ(ππ.πππ‘(Ξ1))) = ππ.int(ππ.ππ(K2 β)) = ππ.int(K1 βC ) = K1 ββ Ξ1 Remark 3.19: In general, the union of two Neutrosophic ππ.(ππΊπΌ) Closed Sets in the space (ππ«π’., ππ.Ο) is not necessarily a Neutrosophic ππ.(ππΊπΌ)πΆπ Closed Set, as demonstrated in the following example. Illustration 3.20: Let ππ«π’. ={s1 β,s2 β}, K1 β=β©x,(5 10,5 10,5 10),(6 10,5 10,4 10)βͺ,K2 β=β©x,(2 10,5 10,8 10),(3 10,5 10,7 10)βͺand K3 β= β©x,(6 10,5 10,4 10),(7 10,5 10,3 10)βͺ. Then ππ«π’. ={0N,K1 β,K2 β,K3 β,1N} is a ππ. T on ππ«π’. . Here Ξ1 = β©x,(1 10,5 10,9 10),(5 10,5 10,5 10)βͺ, Ξ2 =β©x,(5 10,5 10,5 10),(2 10,5 10,8 10)βͺ, are ππ.(ππΊπΌ)πΆππ in ( ππ«π’. , ππ. Ο). But Ξ1βͺ Ξ2 is not an ππ.(ππΊπΌ)πΆπ as Ξ1βͺ Ξ2 = β©x,(5 10,5 10,5 10),(5 10,5 10,5 10)βͺβ K1 β but ππ.(πππ(Ξ1βͺΞ2) =β©x,(6 10,5 10,4 10),(7 10,5 10,3 10)βͺ β K1 β. Remark 3.21: The intersection of any two ππ.(ππΊπΌ)πΆππ is not an ππ.(ππΊπΌ)πΆπ in general as seen in the following example. Illustration 3.22: Let ππ«π’. ={s1 β,s2 β}, K1 β=β©x,(5 10,5 10,5 10),(6 10,5 10,4 10)βͺ,K2 β=β©x,(2 10,5 10,8 10),(3 10,5 10,7 10)βͺand K3 β= β©x,(6 10,5 10,4 10),(7 10,5 10,3 10)βͺ. Then ππ«π’. ={0N,K1 β,K2 β,K3 β,1N} is a ππ. T on ππ«π’. .Here Ξ1 =
Neutrosophic Sets and Systems, Vol. xx, 20xx 36 Neutrosophic πΈ generalized Ξ± closed sets and its Properties.B.Kalaiselvi ,K.Sivakumar,P.Kalarani, S.Chandrasekarand A.Kesavan Proof: (π) β (ππ) Let Ξ1 is a ππ.( Ξ³GΞ±)OS in ππ«π’.. Then since ππ«π’. is a ππ.πππΌππ1/2bace, Ξ1 is a ππ.(Ξ³)OS in ππ«π’.. Therefore Ξ1οππ.cl(ππ.int(ππ.cl(Ξ1))). (ππ) β (πππ) Let Ξ1οππ. cl( ππ. int( ππ. cl( Ξ1))). Then ππ. cl( Ξ1)οππ. cl( ππ. cl( ππ. int( ππ. cl( Ξ1)))) = ππ.cl(ππ.int(ππ.cl(Ξ1)))οππ.cl(Ξ1).Therefore ππ.cl(Ξ1) = ππ.cl(ππ.int(ππ.cl(Ξ1))). Hence ππ.cl(Ξ1) ππ.RC(ππ«π’.). (πππ) β (π) Since cl(Ξ1) is a ππ.(R)CS in ππ«π’., ππ.cl(Ξ1)=ππ.cl(ππ.int(ππ.cl(Ξ1))) and since Ξ1 ο ππ.cl(Ξ1), Ξ1 ο ππ.cl(ππ.int(ππ.cl(Ξ1))). Therefore Ξ1 is a N(Ξ³)OS. Hence Ξ1 is a ππ.( Ξ³GΞ±)OS in ππ«π’. Claim 5.13: Let (ππ«π’., ππ.Ο) is a ππ. Ξ³GΞ±bT1/2 space, then the following conditions are equivalent: (i) Ξ1 is a ππ.( Ξ³GΞ±)CS in ππ«π’., (ii) ππ.int(ππ.cl(ππ.int(Ξ1))) ο Ξ1, (iii) ππ.int(Ξ1) β ππ.RO(ππ«π’.). Proof: This claim can be easily proved by taking complement in claim 4.16 6. Limitations of the Study While the study successfully introduces and generalizes the concept of Neutrosophic πΈ -generalized Ξ± - closed sets, it is not without limitations. Firstly, the research is entirely theoretical and lacks practical applications or real-world data validation. The examples used are limited to small, finite Neutrosophic spaces, which may not reflect the behavior of these sets in large or complex topological systems. Secondly, no algorithmic or computational methods are developed to detect or implement these sets in applied settings. Thirdly, the study does not address the dynamic behavior of these sets under changes in the underlying topological space. Lastly, potential applications in decision-making, data analysis, or artificial intelligence are not explored, leaving the practical relevance of the proposed sets for future investigation. 7. Future Work The proposed class of Neutrosophic πΈ -generalized Ξ±-closed sets (Ne.(Ξ³G πͺ )CS opens multiple avenues for future investigation. One notable avenue is the creation of computational algorithms to detect and analyze (Ne.(Ξ³G πͺ )CS in large Neutrosophic topological spaces, making the concept applicable to practical decisionmaking and uncertainty modeling.. Future work may also investigate dynamic Neutrosophic systems where the topology evolves over time, requiring adaptive closure properties. In addition, exploring the application of (Ne.(Ξ³G πͺ )CS) in fields such as digital topology, image processing, data clustering, and granular computing could provide real-world relevance. Another direction involves studying dual concepts like Neutrosophic πΈ - generalized Ξ±-interior sets and their topological implications. Overall, the foundational structure developed in this study paves the way for further theoretical expansion and interdisciplinary applications in systems that involve incomplete, imprecise, or inconsistent information.
Neutrosophic Sets and Systems, Vol. xx, 20xx 37 Neutrosophic πΈ generalized Ξ± closed sets and its Properties.B.Kalaiselvi ,K.Sivakumar,P.Kalarani, S.Chandrasekarand A.Kesavan The comparative analysis table.1 evaluates the proposed Neutrosophic πΎ -generalized πͺ -closed sets (Ne.( πΎ G πͺ )CS) alongside traditional Neutrosophic closed set typesβnamely πͺ -closed, semi-closed, pre-closed, and πΎ -closed sets. Each class is compared based on criteria such as openness foundation, closure operator used, scope of generalization, and inclusion relationships. Traditional set types depend on specific types of open sets ( πͺ , semi, pre, πΎ) and corresponding closures, often with narrow generalization and limited structural relationships. In contrast, (Ne.(Ξ³G πͺ )CS) utilizes π« -closure and Ξ±-open sets, providing a unified and more flexible framework. The table confirms that (Ne.(Ξ³G πͺ )CS) includes all traditional types as special cases, while none of the others offer similar inclusiveness. Reverse implications do not generally hold for (Ne.(Ξ³G πͺ )CS), which is supported through counterexamples in the paper. The proposed class also demonstrates improved behavior under operations like union and intersection, which is often not preserved in other types. Furthermore, it better captures uncertainty and hybrid behavior due to its broader formulation. This enhanced expressiveness makes (Ne.(Ξ³G πͺ )CS) more applicable to advanced modeling in uncertain topological environments. The comparison validates the generality, strength, and necessity of the proposed class within Neutrosophic topology. Table 1: Comparison between the proposed Neutrosophic Ξ³-generalized Ξ±-closed sets and traditional Neutrosophic closed set types Feature πͺ - Closed Sets SemiClosed Sets Pre-Closed Sets πΈ - Closed Sets Proposed Ne.( πΈ G πͺ )CS Openness Basis πͺ -open sets Semi-open sets Pre-open sets πΎ -open sets πͺ -open sets Closure Type Used πͺ -closure or identity Semiclosure Pre-closure πΎ -closure π« -closure (broader) Defined via Inclusion via πͺ -open set Supersetβs semi-open relation Pre-open neighborhood inclusion πΎ -open neighborhood containment π« -closure inclusion inside Ξ±-open sets Scope of Generalization Narrow Moderate Moderate Broader than πͺ Broadest β generalizes all Inclusion of Other Sets Does not include others Does not include others Does not include others Partial inclusion of πͺ and semi Includes Ξ±, semi, pre, and Ξ³ as special cases Reverse Implication May hold in special cases Not always true Often fails Rarely holds Proven false via counterexamples Support for Hybrid Behavior Limited Limited Limited Partial High β designed for uncertain overlap Behavior under Union/Intersection Not always closed Not preserved Not preserved Sometimes preserved Analyzed in claims; flexible
Neutrosophic Sets and Systems, Vol. xx, 20xx 38 Neutrosophic πΈ generalized Ξ± closed sets and its Properties.B.Kalaiselvi ,K.Sivakumar,P.Kalarani, S.Chandrasekarand A.Kesavan Expressiveness under Uncertainty Low Moderate Moderate Moderate High β handles mixed/indeterminate membership Application Readiness Theoretical Theoretical Theoretical Theoretical Theoretical; open for future applications 8. Conclusion In this articles, introduced and examined a new class of sets in Neutrosophic topology, namely Neutrosophic πΎ -generalized Ξ±-closed sets (πΎ GS-closed sets) and their counterparts, Neutrosophic πΎ - generalized πͺ -open sets (πΎ GS-open sets). These sets represent a meaningful generalization of existing Neutrosophic closed and open set concepts, enriching the structural framework of Neutrosophic topological spaces. We have discussed several foundational properties of these sets and explored their relationships with previously established classes of Neutrosophic sets, highlighting their uniqueness and broader applicability. The results obtained in this work not only contribute to the theoretical development of Neutrosophic topology but also pave the way for further generalizations and refinements. Future research could focus on extending these sets under different topological operators, examining their behavior in product spaces, and exploring their role in Neutrosophic continuity, compactness, and separation axioms. Additionally, potential applications in fields dealing with uncertainty, such as decision-making, data analysis, and artificial intelligence, can be explored by leveraging the flexible nature of πΎ GS-closed and πΎ GS-open sets. This work thus lays a solid foundation for advancing both theoretical investigations and practical applications within the broader domain of Neutrosophic mathematics. Funding No financial or external support from individuals or organizations was received for this study. Acknowledgments Sincere gratitude is extended to all who offered support, motivation, and valuable insights throughout the progression of this research. Appreciation is also due to the readers for their interest and to the authors of the referenced works, whose contributions laid the groundwork for this study. Thanks are given to the individuals and organizations that provided the necessary facilities and resources for the successful execution and dissemination of this paper. Lastly, acknowledgment is given to everyone who contributed to this project in any capacity. Data Availability The present work is wholly theoretical, with no inclusion of data gathering or analytical evaluation. Prospective researchers are invited to conduct empirical research to further investigate and substantiate the ideas outlined in this paper.
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Neutrosophic Sets and Systems, Vol. xx, 20xx 40 Neutrosophic πΈ generalized Ξ± closed sets and its Properties.B.Kalaiselvi ,K.Sivakumar,P.Kalarani, S.Chandrasekarand A.Kesavan [13] L.A. Zadeh, Fuzzy sets, Information and Control 8 (1965) 338β353. [14] Renu Thomas and S. Anila, On Neutrosophic Semi-preopen Sets and Semi-preclosed Sets in a Neutrosophic Topological bace, International Journal of Scientific Research in Mathematical and Statistical Sciences 5 (2018) 138β143. [15] P. Evanzalin Ebenanjar, H. Jude Immaculate and C. Bazil Wilfred, On Neutrosophic b-open sets in Neutrosophic topological bace, IOP Conference Series: Journal of Physics: 1139 (2018) 012062. Received: July 9, 2025. Accepted: Dec 15, 2025