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Browsing by Author "Gregori Gregori, Valentín"

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Browsing by Author "Gregori Gregori, Valentín"

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    A Banach contraction principle in fuzzy metric spaces defined by means of t-conorms 
    Gregori Gregori, Valentín; Miñana, Juan-José (Springer-Verlag, 2021-07)
    [EN] Fixed point theory in fuzzy metric spaces has grown to become an intensive field of research. The difficulty of demonstrating a fixed point theorem in such kind of spaces makes the authors to demand extra conditions ...
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    A characterization of p-complete fuzzy metric spaces 
    Gregori Gregori, Valentín; Miñana, Juan-José; Roig, Bernardino; Sapena Piera, Almanzor (Elsevier, 2022-09-10)
    [EN] George and Veeramani characterized complete fuzzy metric spaces ¿ by means of nested sequences of closed sets of X which have fuzzy diameter zero. According to the concept of p-convergence due to D. Mihet, an appropriate ...
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    A Characterization of Strong Completeness in Fuzzy Metric Spaces 
    Gregori Gregori, Valentín; Miñana, Juan-José; Roig, Bernardino; Sapena Piera, Almanzor (MDPI AG, 2020-06)
    [EN] Here, we deal with the concept of fuzzy metric space(X,M,*), due to George and Veeramani. Based on the fuzzy diameter for a subset ofX, we introduce the notion of strong fuzzy diameter zero for a family of subsets. ...
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    A Duality Relationship Between Fuzzy Partial Metrics and Fuzzy Quasi-Metrics 
    Gregori Gregori, Valentín; Miñana, Juan-José; Miravet, David (MDPI AG, 2020-09)
    [EN] In 1994, Matthews introduced the notion of partial metric and established a duality relationship between partial metrics and quasi-metrics defined on a set X. In this paper, we adapt such a relationship to the fuzzy ...
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    A note on convergence in fuzzy metric spaces 
    Gregori Gregori, Valentín; Miñana, Juan-José; Morillas, Samuel (University of Sistan and Baluchestan, 2014-08)
    [EN] The sequential p-convergence in a fuzzy metric space, in the sense of George and Veeramani, was introduced by D. Mihet as a weaker concept than convergence. Here we introduce a stronger concept called s-convergence, ...
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    A note on local bases and convergence in fuzzy metric spaces 
    Gregori Gregori, Valentín; Miñana Prats, Juan José; Morillas Gómez, Samuel (Elsevier, 2014-02-15)
    In the context of fuzzy metrics in the sense of George and Veeramani, we study when certain families of open balls centered at a point are local bases at this point. This question is related to p-convergence and ...
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    A simple fuzzy method to remove mixed Gaussian-Impulsive noise from color images 
    Camarena Estruch, Joan Gerard; Gregori Gregori, Valentín; Morillas, Samuel; Sapena Piera, Almanzor (Institute of Electrical and Electronics Engineers (IEEE), 2013-10-02)
    Mixed impulsive and Gaussian noise reduction from digital color images is a challenging task because it is necessary to appropriately process both types of noise that in turn need to be distinguished from the original image ...
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    A technique for fuzzifying metric spaces via metric preserving mappings 
    Gregori Gregori, Valentín; Miñana, Juan-José; Valero Sierra, Óscar (Elsevier, 2018)
    [EN] In this paper we develop a new technique for constructing fuzzy metric spaces, in the sense of George and Veeramani, from metric spaces and by means of the Lukasievicz t-norm. In particular such a technique is based ...
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    Acondicionamiento acústico del Casino Liberal de Algemesí 
    Lopez Sundh, Emma (Universitat Politècnica de València, 2020-07-31)
    El objetivo de este proyecto es lograr que el TR (tiempo de reverberación) del restaurante no sobrepase los límites establecidos en el Documento Básico HR (DB-HR) “Protección frente al ruido” del Código Técnico de ...
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    Adaptive marginal median filter for colour images 
    Morillas, Samuel; Gregori Gregori, Valentín; Sapena Piera, Almanzor (MDPI, 2011)
    [EN] This paper describes a new filter for impulse noise reduction in colour images which is aimed at improving the noise reduction capability of the classical vector median filter. The filter is inspired by the application ...
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    Aplicació de mètriques fuzzy en la millora computacional d'algorismes de filtratge d'imatges en color 
    Camarena Estruch, Joan Gerard (Universitat Politècnica de València, 2009-04-02)
    El filtrado de imágenes es una tarea fundamental para la mayoría de los sistemas de visión por computador cuando las imágenes se usan para análisis automático o, incluso, para inspección humana. De hecho, la presencia de ...
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    Álgebra matricial 
    Estruch Fuster, Vicente Domingo; Gregori Gregori, Valentín; Roig Sala, Bernardino (Editorial Universitat Politècnica de València, 2017-07-28)
    El libro,como es usual en textos matemáticos,expone los resulta-dos con una continuada argumentación, pero en este caso sin apenas demostraciones. No obstante,en letra pequeña se presentan pruebas abreviadas o extensiones ...
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    Cauchyness and convergence in fuzzy metric spaces 
    Gregori Gregori, Valentín; Miñana, Juan-José; Morillas, Samuel; Sapena Piera, Almanzor (Springer-Verlag, 2017)
    [EN] In this paper we survey some concepts of convergence and Cauchyness appeared separately in the context of fuzzy metric spaces in the sense of George and Veeramani. For each convergence (Cauchyness) concept we find a ...
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    CÁLCULO BÁSICO 
    Boigues Planes, Francisco José; Estruch Fuster, Vicente Domingo; Gregori Gregori, Valentín; Roig Sala, Bernardino; Sapena Piera, Almanzor; Vidal Meló, Anna (Editorial Universitat Politècnica de València, 2014-10-30)
    Este libro es una revisión matemática de los conceptos fundamentales sobre cálculo, adecuado a los estudiantes de nuevo ingreso en la Universidad. Los autores han planteado el contenido como un curso teórico-práctico en ...
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    Characterizing a class of completable fuzzy metric spaces 
    Gregori Gregori, Valentín; Miñana, Juan José; Morillas, Samuel; Sapena Piera, Almanzor (Elsevier, 2016-04-15)
    In this paper we give a characterization of the class of completable strong (non-Archimedean) fuzzy metric spaces, in the sense of George and Veeramani.
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    Completable fuzzy metric spaces 
    Gregori Gregori, Valentín; Miñana, Juan-José; Sapena Piera, Almanzor (Elsevier, 2017)
    [EN] In the context of fuzzy metrics in the sense of George and Veeramani, we introduce the concept of stratified fuzzy metric. Many well-known fuzzy metrics are stratified. We prove that stratified strong fuzzy metric ...
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    Contractive sequences in fuzzy metric spaces 
    Gregori Gregori, Valentín; Miñana, Juan-José; Miravet-Fortuño, David (Elsevier, 2020-01-15)
    [EN] In this paper we present an example of a fuzzy psi-contractive sequence in the sense of D. Mihet, which is not Cauchy in a fuzzy metric space in the sense of George and Veeramani. To overcome this drawback we introduce ...
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    ERRORES, OPTIMIZACIÓN Y RESOLUCIÓN NUMÉRICA DE SISTEMAS 
    Gregori Gregori, Valentín; Roig Sala, Bernardino (Editorial Universitat Politècnica de València, 2019-02-15)
    El presente libro es un texto autocontenido sobre la resolución numérica de problemas esenciales para alumnos de ingeniería, como el control del error, la optimización y resolución de ecuaciones y sistemas de ecuaciones. ...
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    Espacios métricos fuzzy definidos por t-normas 
    Sapena Piera, Almanzor (Universitat Politècnica de València, 2009-06-16)
    Se prosigue con el estudio de los espacios métricos fuzzy introducidos por George y Veeramani. Se aportan nuevas propiedades y se tratan cuestiones como la completación, la continuidad uniforme y teoremas de punto fijo. Se ...
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    Examples of fuzzy metrics and applications 
    Gregori Gregori, Valentín; Morillas, Samuel; Sapena Piera, Almanzor (Elsevier, 2011-05)
    In this paper we present new examples of fuzzy metrics in the sense of George and Veeramani. The examples have been classified attending to their construction and most of the well-known fuzzy metrics are particular cases ...