Visualitza UJI: Investigación per autoria "74c06c68-6fad-4312-b664-5b8891fee76e"
Ara mostrant els elements 1-11 d 11
-
A Generalized Mazur-Ulam Theorem for Fuzzy Normed Spaces
Font, Juan J.; Galindo, Jorge; Macario, Sergio; Sanchis López, Manuel Hindawi Publishing Corporation (2014-06-02)We introduce fuzzy norm-preserving maps, which generalize the concept of fuzzy isometry. Based on the ideas from Vogt, 1973, and V¨ais¨al¨a, 2003, we provide the following generalized version of theMazur-Ulam theorem in ... -
Best Approximation Results for Fuzzy-Number-Valued Continuous Functions
Font, Juan J.; Macario, Sergio MDPI (2023-02)In this paper, we study the best approximation of a fixed fuzzy-number-valued continuous function to a subset of fuzzy-number-valued continuous functions. We also introduce a method to measure the distance between a ... -
Cálculo
Font, Juan J.; Hernández, Salvador; Macario, Sergio Universitat Jaume I (2009) -
Constructive approximation of continuous interval- valued functions
Font, Juan J.; Macario, Sergio Taylor & Francis (2021-11-28)In this paper we present a Stone-Weierstrass type result in the context of continuous interval-valued functions defined on a compact Hausdorff space. We also provide a Jackson type approximation result involving the modulus ... -
Endograph Metric and a Version of the Arzelà–Ascoli Theorem for Fuzzy Sets
Font, Juan J.; Macario, Sergio; Sanchis, Manuel MDPI (2023)In this paper, we provide several Arzelà–Ascoli-type results on the space of all continuous functions from a Tychonoff space X into the fuzzy sets of Rn , (FUSCB(Rn),Hend) , which are upper semi-continuous and have bounded ... -
Exercicis resolts i comentats de fonaments matemàtics aplicats a l' edificació
Macario, Sergio Publicacions de la Universitat Jaume I (2018) -
Gromov–Hausdorff convergence of non-Archimedean fuzzy metric spaces
Macario, Sergio; Sanchis López, Manuel Elsevier (2015)We introduce the notion of the Gromov–Hausdorff fuzzy distance between two non-Archimedean fuzzy metric spaces (in the sense of Kramosil and Michalek). Basic properties involving convergence and the fuzzy version of the ... -
Jackson-type approximation for fuzzy-valued functions by means of trapezoidal functions
Font, Juan J.; Macario, Sergio University of Sistan and Baluchestan (2023-12-15)In this paper, we provide new several Jackson-type approximations results for continuous fuzzy-number-valued functions which improve several previous ones. We use alternative techniques adapted from Interval Analysis which ... -
Mazur-Ulam type theorems for fuzzy normed spaces
Font, Juan J.; Galindo, Jorge; Macario, Sergio; Sanchis López, Manuel International Scientific Research Publications (ISRP) (2017-08)In this paper, we provide Mazur-Ulam type results for (not necessarily surjective) maps preserving equality of fuzzy distance defined between two fuzzy normed spaces. Our main goal is to study the additivity of such ... -
Pseudocompact group topologies with no infinite compact subsets
Galindo, Jorge; Macario, Sergio Elsevier (2011)We show that every Abelian group satisfying a mild cardinal inequality admits a pseudocompact group topology from which all countable subgroups inherit the maximal totally bounded topology (we say that such a topology satisfies ... -
Uncountable products of determined groups need not be determined
Hernández, Salvador; Macario, Sergio; Trigos, Javier Elsevier (2008)If H is a dense subgroup of G, we say that H determines G if their groups of characters are topologically isomorphic when equipped with the compact open topology. If every dense subgroup of G determines G, then we say that ...