You are currently on the new version of our website. Access the old version .

61 Results Found

  • Article
  • Open Access
500 Views
9 Pages

1 September 2025

This paper develops extension theory for Brown functors in directed graph homotopy theory. We establish a systematic method for extending Brown functors from finite directed graphs to arbitrary directed graphs using inverse limits over finite subdigr...

  • Feature Paper
  • Article
  • Open Access
1 Citations
2,044 Views
21 Pages

Gradual and Fuzzy Modules: Functor Categories

  • Josefa M. García and
  • Pascual Jara

15 November 2022

The categorical treatment of fuzzy modules presents some problems, due to the well known fact that the category of fuzzy modules is not abelian, and even not normal. Our aim is to give a representation of the category of fuzzy modules inside a genera...

  • Article
  • Open Access
9 Citations
2,750 Views
17 Pages

2 June 2020

Various types of topological and closure operators are significantly used in fuzzy theory and applications. Although they are different operators, in some cases it is possible to transform an operator of one type into another. This in turn makes it p...

  • Article
  • Open Access
1 Citations
2,133 Views
15 Pages

18 January 2024

Mallios and Zafiris emphasize that adjoint functors, or adjunctions, are not only “ubiquitous” in category theory but also characterize the naturality of their approach to physical geometry. Hence, in this paper, the history and theory of...

  • Article
  • Open Access
12 Citations
2,739 Views
9 Pages

Some Cardinal and Geometric Properties of the Space of Permutation Degree

  • Ljubiša D. R. Kočinac,
  • Farkhod G. Mukhamadiev and
  • Anvar K. Sadullaev

14 June 2022

This paper is devoted to the investigation of cardinal invariants such as the hereditary density, hereditary weak density, and hereditary Lindelöf number. The relation between the spread and the extent of the space SP2(R,τ(A)) of permutation...

  • Article
  • Open Access
433 Views
28 Pages

Completeness and Cocompleteness Transfer for Internal Group Objects with Geometric Obstructions

  • Jian-Gang Tang,
  • Nueraminaimu Maihemuti,
  • Jia-Yin Peng,
  • Yimamujiang Aisan and
  • Ai-Li Song

2 October 2025

This work establishes definitive conditions for the inheritance of categorical completeness and cocompleteness by categories of internal group objects. We prove that while the completeness of Grp(C) follows unconditionally from the completeness of th...

  • Article
  • Open Access
274 Views
27 Pages

Completeness and Hereditary Transfer of Exactness Properties for Internal Group Objects in D-Modules

  • Jian-Gang Tang,
  • Miao Liu,
  • Huangrui Lei,
  • Nueraminaimu Maihemuti,
  • Quan-Guo Chen and
  • Jia-Yin Peng

16 December 2025

This paper establishes a comprehensive framework for the hereditary transfer of categorical completeness and cocompleteness to categories of internal group objects in D-modules. We prove that while completeness of Grp(D-Mod) follows unconditionally f...

  • Article
  • Open Access
1 Citations
622 Views
20 Pages

18 July 2025

This paper introduces and investigates the fundamental properties of L-primals, a generalization of the primal concept within the framework of L-fuzzy sets and complete lattices. Building upon the established theories of L-topological spaces and L-pr...

  • Article
  • Open Access
3 Citations
2,330 Views
14 Pages

Category of Intuitionistic Fuzzy Modules

  • Poonam Kumar Sharma,
  • Chandni and
  • Nitin Bhardwaj

27 January 2022

We study the relationship between the category of R-modules (CR-M) and the category of intuitionistic fuzzy modules (CR−IFM). We construct a category CLat(R−IFM) of complete lattices corresponding to every object in CR−M and then sh...

  • Article
  • Open Access
2 Citations
2,234 Views
16 Pages

31 December 2021

We construct a 2-categorical extension of the relative entropy functor of Baez and Fritz, and show that our construction is functorial with respect to vertical morphisms. Moreover, we show such a ‘2-relative entropy’ satisfies natural 2-c...

  • Article
  • Open Access
1,878 Views
22 Pages

Category theory has foundational importance because it provides conceptual lenses to characterize what is important and universal in mathematics—with adjunction seeming to be the primary lens. Our topic is a theory showing “where adjoints...

  • Article
  • Open Access
3 Citations
1,191 Views
6 Pages

On the Space of G-Permutation Degree of Some Classes of Topological Spaces

  • Ljubiša D. R. Kočinac,
  • Farkhod G. Mukhamadiev and
  • Anvar K. Sadullaev

12 November 2023

In this paper, we study the space of G-permutation degree of some classes of topological spaces and the properties of the functor SPGn of G-permutation degree. In particular, we prove: (a) If a topological space X is developable, then so is SPGnX; (b...

  • Article
  • Open Access
96 Views
20 Pages

19 January 2026

This paper is devoted to the study of the interrelationships among LF-grills, LF-ideals, LF-neighborhoods, LF-topologies, and LF-co-topologies. We establish a categorical framework that demonstrates the interconnections among these concepts. In addit...

  • Article
  • Open Access
13 Citations
2,744 Views
22 Pages

4 July 2019

In this paper, we investigate the Koszul behavior of finitely semi-graded algebras by the distributivity of some associated lattice of ideals. The Hilbert series, the Poincaré series, and the Yoneda algebra are defined for this class of algebr...

  • Feature Paper
  • Article
  • Open Access
1 Citations
3,121 Views
18 Pages

22 September 2020

The natural transformation constitutes one of the most important entity of category theory and it introduces a piece of sophisticated dynamism to the categorial structures. Each natural transformation forms a unique mapping between the so-called func...

  • Article
  • Open Access
2 Citations
1,596 Views
22 Pages

2 February 2023

Many of the new MV-valued fuzzy structures, including intuitionistic, neutrosophic, or fuzzy soft sets, can be transformed into so-called almost MV-valued fuzzy sets, or, equivalently, fuzzy sets with values in dual pair of semirings (in symbols, (R,...

  • Article
  • Open Access
7 Citations
1,527 Views
7 Pages

Tightness-Type Properties of the Space of Permutation Degree

  • Ljubiša D. R. Kočinac,
  • Farkhod G. Mukhamadiev and
  • Anvar K. Sadullaev

15 September 2022

In this paper we, prove that if the product Xn of a space X has certain tightness-type properties, then the space of permutation degree SPnX has these properties as well. It is proven that the set tightness (T-tightness) of the space of permutation d...

  • Article
  • Open Access
3 Citations
2,333 Views
20 Pages

Algebraic Structures Induced by the Insertion and Detection of Malware

  • Agustín Moreno Cañadas,
  • Odette M. Mendez and
  • Juan David Camacho Vega

Since its introduction, researching malware has had two main goals. On the one hand, malware writers have been focused on developing software that can cause more damage to a targeted host for as long as possible. On the other hand, malware analysts h...

  • Article
  • Open Access
20 Citations
2,819 Views
25 Pages

A Novel Categorical Approach to Semantics of Relational First-Order Logic

  • Wolfgang Schreiner,
  • William Steingartner and
  • Valerie Novitzká

23 September 2020

We present a categorical formalization of a variant of first-order logic. Unlike other texts on this topic, the goal of this paper is to give a very transparent and self-contained account without requiring more background than basic logic and set the...

  • Feature Paper
  • Article
  • Open Access
1 Citations
1,146 Views
19 Pages

Level-Agnostic Representations of Interacting Agents

  • Fernando Tohmé and
  • Andrés Fioriti

29 August 2024

The study of the interactions among intentional agents, with rationality being the main source of intentional behavior, requires mathematical tools capable of capturing systemic effects. Here, we choose an alternative toolbox based on Category Theory...

  • Article
  • Open Access
7,302 Views
22 Pages

24 January 2019

The Müller-Wichards model (MW) is an algebraic method that quantitatively estimates the performance of sequential and/or parallel computer applications. Because of category theory’s expressive power and mathematical precision, a category t...

  • Article
  • Open Access
13 Citations
2,733 Views
27 Pages

The Information Loss of a Stochastic Map

  • James Fullwood and
  • Arthur J. Parzygnat

8 August 2021

We provide a stochastic extension of the Baez–Fritz–Leinster characterization of the Shannon information loss associated with a measure-preserving function. This recovers the conditional entropy and a closely related information-theoretic measure tha...

  • Article
  • Open Access
9 Citations
7,352 Views
34 Pages

18 November 2010

The general theory of information (GTI) is a synthetic approach, which reveals the essence of information, organizing and encompassing all main directions in information theory. On the methodological level, it is formulated as system of principles ex...

  • Article
  • Open Access
10 Citations
5,352 Views
17 Pages

15 August 2021

The growing complexity of modern practical problems puts high demand on mathematical modelling. Given that various models can be used for modelling one physical phenomenon, the role of model comparison and model choice is becoming particularly import...

  • Review
  • Open Access
23 Citations
11,516 Views
21 Pages

17 December 2019

Consciousness is a central issue in neuroscience, however, we still lack a formal framework that can address the nature of the relationship between consciousness and its physical substrates. In this review, we provide a novel mathematical framework o...

  • Article
  • Open Access
9 Citations
5,075 Views
37 Pages

Universal Causality

  • Sridhar Mahadevan

27 March 2023

Universal Causality is a mathematical framework based on higher-order category theory, which generalizes previous approaches based on directed graphs and regular categories. We present a hierarchical framework called UCLA (Universal Causality Layered...

  • Review
  • Open Access
1,139 Views
53 Pages

22 July 2025

These notes are an informal overview of techniques related to deformation theory in the context of physics. Beginning from motivation for the concept of a sheaf, they build up through derived functors, resolutions, and the functor of points to the no...

  • Article
  • Open Access
918 Views
14 Pages

The Category G-GrR-Mod and Group Factorization

  • Rahmah Al-Omari and
  • Mohammed Al-Shomrani

25 October 2024

In this work, we use the concept of G-weak graded rings and G-weak graded modules, which are based on grading by a set G of left coset representatives for the left action of a subgroup H of a finite X on X, to define the conjugation action of the set...

  • Article
  • Open Access
4,586 Views
72 Pages

The contribution of this article is quadruple. It (1) unifies various schemes of premodels/models including situations such as presheaves/sheaves, sheaves/flabby sheaves, prespectra/ Ω -spectra, simplicial topological spaces/(complete) Segal spac...

  • Article
  • Open Access
2,253 Views
37 Pages

Augmented Simplicial Combinatorics through Category Theory: Cones, Suspensions and Joins

  • José Manuel García-Calcines,
  • Luis Javier Hernández-Paricio and
  • María Teresa Rivas-Rodríguez

14 February 2022

In this work, we analyze the combinatorial properties of the category of augmented semi-simplicial sets. We consider various monoidal structures induced by the co-product, the product, and the join operator in this category. In addition, we also cons...

  • Article
  • Open Access
1 Citations
1,426 Views
10 Pages

1 December 2004

Using a free simphicial group with given a CW-basis, we give an alternative description of the top group of the free square complex and 2-crossed complex of groups on 2-construction data in terms of tensors and coproducts of crossed module of groups....

  • Article
  • Open Access
3 Citations
5,921 Views
13 Pages

The Duality between Corings and Ring Extensions

  • Florin F. Nichita and
  • Bartosz Zielinski

10 August 2012

We study the duality between corings and ring extensions. We construct a new category with a self-dual functor acting on it, which extends that duality. This construction can be seen as the non-commutative case of another duality extension: the duali...

  • Article
  • Open Access
1 Citations
2,899 Views
7 Pages

31 December 2019

The starting point is Peano’s expression of the axiomatics of natural numbers in the framework of Leśniewski’s elementary ontology. The author enriches elementary ontology with the so-called Frege’s predication scheme and goes on to...

  • Feature Paper
  • Article
  • Open Access
1,559 Views
30 Pages

9 April 2024

Recently, Gorenstein dimensions relative to a semidualizing module have been the subject of numerous studies with interesting extensions of the classical homological dimensions. Although all these studies share the same direction, a common basis, and...

  • Article
  • Open Access
2 Citations
1,863 Views
29 Pages

27 April 2021

Let (C,E,s) be an extriangulated category with a proper class ξ of E-triangles and X a resolving subcategory of C. In this paper, we introduce the notion of X-resolution dimension relative to the subcategory X in C, and then give some descriptions of...

  • Article
  • Open Access
2 Citations
1,899 Views
18 Pages

12 October 2022

Let CAn=C[S2≀S2≀⋯≀S2] be the group algebra of an n-step iterated wreath product. We prove some structural properties of An such as their centers, centralizers, and right and double cosets. We apply these results to explicitly...

  • Discussion
  • Open Access
10 Citations
6,210 Views
11 Pages

20 March 2019

In this discussion paper we argue that category theory may play a useful role in formulating, and perhaps proving, results in ergodic theory, topogical dynamics and open systems theory (control theory). As examples, we show how to characterize Kolmog...

of 2