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Doctoral Thesis
DOI
https://doi.org/10.11606/T.45.2021.tde-01112021-110346
Document
Author
Full name
Maicon Aparecido Pinheiro
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2021
Supervisor
Committee
Fontes, Luiz Renato Goncalves (President)
Gomes, Pablo Almeida
Hilário, Marcelo Richard
Iambartsev, Anatoli
Vares, Maria Eulalia
Title in Portuguese
Processos em meios aleatórios espaço-temporais
Keywords in Portuguese
Ambientes aleatórios dinâmicos
Passeios aleatórios
Processos estocásticos
Abstract in Portuguese
Consideramos um passeio aleatório de média nula em Z^d a tempo contínuo num ambiente espaço-temporal em Z^d x R_+ dado por processos de nascimento e morte independentes e identicamente distribuídos; de modo que as taxas de salto do passeio, meio-dependentes e dinâmicas no espaço-tempo, são dadas por uma função exponencial decrescente do meio na posição do passeio e assumem valores no conjunto não compacto (0, 1]. Discorremos sobre o comportamento assintótico do processo, quando o tempo diverge.
Title in English
Processes in space-time random environments
Keywords in English
Dynamical random environments
Random walks
Stochastic processes
Abstract in English
We consider a zero mean random walk on Z^d in a space-time environment on Z^d x R_+ given by independent and identically distributed birth and death processes; in such a way that the random walk space-time environment-dependent jump rates are given by an exponentially decreasing function of the environment on the current position and assume values in the non-compact set (0, 1]. We discuss the process asymptotic behavior, when time diverges.
 
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Publishing Date
2022-01-24
 
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