MA - Artículos
Envíos recientes
-
Vertically averaged and moment equations: new derivation, efficient numerical solution and comparison with other physical approximations for modeling non-hydrostatic free surface flows
(Elsevier, 2024-02-27)Efficient modeling of flow physics is a prerequisite for a reliable computation of free-surface environmental flows. Non-hydrostatic flows are often present in shallow water environments, making the task challenging. In ... -
Connecting ideals in evolution algebras with hereditary subsets of its associated graph
(2023)In this article, we introduce a relation including ideals of an evo-lution algebra and hereditary subsets of vertices of its associated graph andestablish some properties among them. This relation allows us to determinemaximal ... -
Largest ideals in Leavitt path algebras.
(Springer Nature, 2020-02-22)We identify largest ideals in Leavitt path algebras: the largest locally left/right artinian (which is the largest semisimple one), the largest locally left/right noetherian without minimal idempotents, the largest exchange, ... -
Representations of relative Cohn path algebras.
(Elsevier, 2020-01-07)We study relative Cohn path algebras, also known as Leavitt-Cohn path algebras, and we realize them as partial skew group rings. To do this we prove uniqueness theorems for relative Cohn path algebras. Furthermore, given ... -
Leavitt path algebras of Cayley graphs C_n^j.
(Springer Nature, 2018-09-15)Let n be a positive integer. For each 0 <= j <= n-1 we let C_n^j denote the Cayley graph of the cyclic group Zn with respect to the subset {1,j}. Utilizing the Smith Normal Form process, we give an explicit description of ... -
The commutative core of a Leavitt path algebra.
(Elsevier, 2018-06-30)For any unital commutative ring R and for any graph E, we identify the commutative core of the Leavitt path algebra of E with coefficients in R, which is a maximal commutative subalgebra of the Leavitt path algebra. ... -
The cycline subalgebra of a Kumjian-Pask algebra.
(American Mathematical Society, 2016-11-21)Let $\Lambda$ be a row-finite higher-rank graph with no sources. We identify a maximal commutative subalgebra $\mathcal{M}$ inside the Kumjian-Pask algebra ${\rm KP}_R(\Lambda)$. We also prove a generalized Cuntz-Krieger ... -
Parameterized simplification logic I: reasoning with implications and classes of closure operators
(Taylor & Francis, 2020)In this paper, we present a general inference system for reasoning with if-then rules. They are defined using general lattice-theoretic notions and their semantics is defined using particular closure operators parameterized ... -
A conversational recommender system for diagnosis using fuzzy rules.
(Elsevier, 2020-09-15)Graded implications in the framework of Fuzzy Formal Concept Analysis are used as the knowledge guiding the recommendations. An automated engine based on fuzzy Simplification Logic is proposed to make the suggestions to ... -
Parameterized Simplification Logic: Reasoning With Implications in an Automated Way
(IEEE, 2022)In this sequel to our previous article (Cordero et al., 2020) on general inference systems for reasoning with if–then dependencies, we study transformations of if–then rules to semantically equivalent collections of if–then ... -
A Geo[X]/G[X]/1 retrial queueing system with removal work and total renewal discipline
(Elsevier, 2018-02)In this paper we consider a discrete-time retrial queueing system with batch arrivals of geometric type and general batch services. The arriving group of customers can decide to go directly to the server expelling out of ... -
SMIS: A Stepwise Multiple Integration Solver Using a CAS.
(MDPI, 2021-11-11)Multiple Integration is a very important topic in different applications in Engineering and other Sciences. Using numerical software to get an approximation to the solution is a normal procedure. Another approach is working ... -
Sojourn Times in a Queueing System with Breakdowns and General Retrial Times.
(MDPI, 2021-11-12)This paper centers on a discrete-time retrial queue where the server experiences breakdowns and repairs when arriving customers may opt to follow a discipline of a last-come, first-served (LCFS)-type or to join the orbit. ... -
An arriving decision problem in a discrete-time queueing system
(Springer, 2019-08)This paper discusses a discrete-time queueing system in which an arriving customer may adopt four different strategies; two of them correspond to a LCFS discipline where displacements or expulsions occur, and in the other ... -
Lexicon-based sentiment analysis in texts using Formal Concept Analysis.
(Elsevier, 2023-02-03)In this paper, we present a novel approach for sentiment analysis that uses Formal Concept Analysis (FCA) to create dictionaries for classification. Unlike other methods that rely on pre-defined lexicons, our approach ... -
Hankel matrices acting on the Hardy space H1 and on Dirichlet spaces.
(Springer, 2018-12-03)If μ is a positive Borel measure on the interval [0, 1) we let H_μ be the Hankel matrix H_μ={ μ_{n,k} }_{n,k} with entries μ_{n,k} =μ_{n+k} where μ_n denotes the moment of order n of μ. This matrix induces formally an ... -
A family of Dirichlet Morrey spaces.
(Taylor & Francis, 2019-02-03)To each weighted Dirichlet space D_p, 0<p<1, we associate a family of Morrey-type spaces D_{λ,p}, 0<λ<1, constructed by imposing growth conditions on the norm of hyperbolic translates of functions. We indicate some of the ... -
Mean Lipschitz spaces and a generalized Hilbert operator.
(Springer, 2018-02-28)If μ is a positive Borel measure on the interval [0, 1) we let H_μ be the Hankel matrix H_μ={ μ_{n,k} }_{n,k} with entries μ_{n,k} =μ_{n+k} where μ_n denotes the moment of order n of μ. This matrix induces formally an ... -
A Hankel matrix acting on spaces of analytic functions.
(Springer, 2017-11-02)If μ is a positive Borel measure on the interval [0, 1) we let H_μ be the Hankel matrix { μ_{n,k} }_{n,k} with entries μ_{n,k} =μ_{n+k}, where, for μ_n denotes the moment of order n of μ. This matrix induces formally an ... -
A generalized Hilbert operator acting on conformally invariant spaces
(Springer Basel AG, 2018)If μ is a positive Borel measure on the interval [0,1), we let H_μ be the Hankel matrix with entries μ_{n,k}=μ_{n+k}, where μ_n denotes the moment of order n of the measure μ. This matrix formally induces an operator on ...