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1.
20 p, 583.3 KB Exponentiated power Maxwell distribution with quantile regression and applications / Gallardo, Diego (Universidad de Atacama, Copiapó (Xile). Departamento de Matemática) ; Gómez, Yolanda (Universidad de Atacama, Copiapó (Xile). Departamento de Matemática) ; Segovia, Francisco A. (Universidad de Atacama, Copiapó (Xile). Departamento de Matemática)
In this paper we introduce an extension of the power Maxwell distribution. We also discuss a reparametrized version of this model applied to quantile regression. Some properties of the model and estimation based on the maximum likelihood estimation method are studied. [...]
2021 - 10.2436/20.8080.02.115
SORT : statistics and operations research transactions, Vol. 45 Núm. 2 (July-December 2021) , p. 181-200 (Articles)  
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2.
20 p, 452.1 KB Discrete generalized half-normal distribution and its applications in quantile regression / Gallardo, Diego (Universidad de Atacama, Copiapó (Xile). Departamento de Matemática) ; Gómez-Déniz, Emilio (Universidad de Las Palmas de Gran Canaria. Departamento de Métodos Cuantitativos en Economía y Gestión) ; Gómez, Héctor W. (Universidad de Antofagasta (Xile). Departamento de Matemáticas)
A new discrete two-parameter distribution is introduced by discretizing a generalized half-normal distribution. The model is useful for fitting overdispersed as well as underdispersed data. The failure function can be decreasing, bathtub shaped or increasing. [...]
2020 - 10.2436/20.8080.02.102
SORT : statistics and operations research transactions, Vol. 44 Núm. 2 (July-December 2020) , p. 265-284 (Articles)  
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3.
14 p, 144.9 KB Bartlett and Bartlett-type corrections for censored data from a Weibull distribution / Magalhães, Tiago M. (Universidade Federal de Juiz de Fora. Department of Statistics, Institute of Exact Sciences) ; Gallardo, Diego (Universidad de Atacama (Copiapó, Xile). Departamento de Matemáticas)
In this paper, we obtain the Bartlett factor for the likelihood ratio statistic and the Bartlett-type correction factor for the score and gradient test in censored data from a Weibull distribution. The expressions derived are simple, we only have to define a few matrices. [...]
2020 - 10.2436/20.8080.02.97
SORT : statistics and operations research transactions, Vol. 44 Núm. 1 (January-June 2020) , p. 127-140 (Articles)  
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4.
22 p, 638.2 KB The Pareto IV power series cure rate model with applications / Gallardo, Diego (Universidad de Atacama (Copiapó, Xile). Departamento de Matemática) ; Gómez, Yolanda (Universidad de Atacama (Copiapó, Xile). Departamento de Matemática) ; Arnold, Barry C. (University of California. Statistics Department) ; Gómez, Héctor W. (Universidad de Antofagasta (Antofagasta, Xile). Departamento de Matemáticas)
Cutaneous melanoma is thought to be triggered by intense, occasional exposure to ultraviolet radiation, either from the sun or tanning beds, especially in people who are genetically predisposed to the disease. [...]
2017 - 10.2436/20.8080.02.61
SORT : statistics and operations research transactions, Vol. 41 Núm. 2 (July-December 2017) , p. 297-318 (Articles)  
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5.
24 p, 284.7 KB Two alternative estimation procedures for the negative binomial cure rate model with a latent activation scheme / Gallardo, Diego (Universidad de Antofagasta (Chile). Departamento de Matemáticas) ; Bolfarine, Heleno (Universidade de São Paulo. Departamento de Estatística)
In this paper two alternative estimation procedures based on the EM algorithm are proposed forthe flexible negative binomial cure rate model with a latent activation scheme. The Weibull modelas well as the log-normal and gamma distributions are also considered for the time-to-event datafor the non-destroyed cells. [...]
2016
SORT : statistics and operations research transactions, Vol. 40 Núm. 1 (January-June 2016) , p. 31-54 (Articles)  
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6.
13 p, 354.6 KB Ergodic results for certain contractions on orlicz spaces with fixed points / Gallardo Gómez, Diego (Universidad de Málaga. Departamento de Matemática Aplicada)
Let (X, M,ų) be a σ-finite measure space, Lø - Lø (X, M, ų) an Orlicz space associated to an N-function ø and let T : Lø→Lø be a linear operator with a fixed point h ≠ 0 a. e . , such that [fórmula matemàtica inclosa a l'article] and it is either a II 1 -contraction in Lø ∩ L1 or a II II∞ . [...]
1989 - 10.5565/PUBLMAT_33189_01
Publicacions matemàtiques, V. 33 n. 1 (1989) p. 3-15  
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7.
6 p, 158.4 KB Orlicz spaces for which the Hardy-Littlewood maximal operator is bounded / Gallardo Gómez, Diego (Universidad de Málaga. Departamento de Matemática Aplicada)
Let M be the Hardy-Littlewood maximal operator defined by [fórmula matemàtica inclosa a l'article] where the supremum is taken over all cubes Q containing x and IQI is the Lebesgue measure of Q. In this paper we characterize the Orlicz spaces L*ø, associated to N--functions ø, such that Mis bounded in L*ø. [...]
1988 - 10.5565/PUBLMAT_32288_09
Publicacions matemàtiques, V. 32 n. 2 (1988) p. 261-266  
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11 Gallardo, David
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