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Quasi-perfect codes in the l(p) metric
(Springer Heidelberg, 2018)
We introduce the notion of degree of imperfection of a code in Z(n) with the l(p) metric, to extend the so-called quasi-perfect codes. Through the establishment of bounds and computational approach, we determine all radii ...
Asymmetric free spaces and canonical asymmetrizations
(Polish Acad Sciences Inst Mathematics-IMPAN, 2021)
A construction analogous to that of Godefroy-Kalton for metric spaces allows one to embed isometrically, in a canonical way, every quasi-metric space (X, d) in an asymmetric normed space F-a (X, d) (its quasi-metric free ...
Metrizabilidade de topologias e distâncias generalizadas
(BrasilUFRNPROGRAMA DE PÓS-GRADUAÇÃO EM MATEMÁTICA APLICADA E ESTATÍSTICA, 2020-03-02)
In this work, we present a study on the metrizability of topologies presenting the necessary
conditions for a topology to be metrizable, i.e., it can be constructed starting from a
metric originating from open balls. In ...
Métricas conformes e Quasi-Einstein em formas espaciais
(2010-09-28)
Caracterizamos, em termos de equações diferenciais, as métricas = , conformes à métrica pseudo-Euclidiana , que são quasi-Einstein. Para um campo de vetores (não-Killing) especial, o sistema de e4quações reduz-se a uma ...
Balls as subspaces of homogeneous type: on a construction due to R. Macías and C. Segovia
(Birkhäuser, 2010)
In this chapter we give an equivalent point of view for quasi-metricstructures on a set X in terms of families of neighborhoods of the diagonal in X×X.We use this approach and the iterative process introduced by R. Macías ...
Discrete approximation of spaces of homogeneous type
(Springer, 2009-01)
In this note we combine the dyadic families introduced by M. Christ in (Colloq. Math. 60/61(2):601-628, 1990) and the discrete partitions introduced by J.M. Wu in (Proc. Am. Math. Soc. 126(5):1453-1459, 1998) to get ...
Double-null formulation of the general Vaidya metric
(Iop Publishing LtdBristolInglaterra, 2012)
Quasi-stationary distributions for structured birth and death processes with mutations
(2011)
We study the probabilistic evolution of a birth and death continuous time
measure-valued process with mutations and ecological interactions. The individuals
are characterized by (phenotypic) traits that take values in a ...
Classifying metrics for assessing object-oriented software maintainability: a family of metrics’ catalogs
(Universidade Federal de Pernambuco, 2015)
Quasi-Perfect Codes From Cayley Graphs Over Integer Rings
(Ieee-inst Electrical Electronics Engineers IncPiscatawayEUA, 2013)