Extinction and Quasi-Stationarity in the Stochastic Logistic SIS Model

This volume presents explicit approximations of the quasi-stationary distribution and of the expected time to extinction from the state one and from quasi-stationarity for the stochastic logistic SIS model. The approximations are derived separately in three different parameter regions, and then combined into a uniform approximation across all three regions. Subsequently, the results are used to derive thresholds as functions of the population size N.

Sommario

1 Introduction.- 2 Model Formulation.- 3 A Birth-Death Process with Finite State Space and with an Absorbing State at the Origin.- 4 The SIS Model: First Approximations of the Quasi-Stationary Distribution.- 5 Some Approximations Involving the Normal Distribution.- 6 Preparations for the Study of the Stationary Distribution p(1) of the SIS Model.- 7 Approximation of the Stationary Distribution p(1) of the SIS Model.- 8 Preparations for the Study of the Stationary Distribution p(0) of the SIS Model.- 9 Approximation of the Stationary Distribution p(0) of the SIS Model.- 10 Approximation of Some Images UnderY for the SIS Model.- 11 Approximation of the Quasi-Stationary Distribution q of the SIS Model.- 12 Approximation of the Time to Extinction for the SIS Model.- 13 Uniform Approximations for the SIS Model.- 14 Thresholds for the SIS Model.- 15 Concluding Comments.

Riassunto

This volume presents explicit approximations of the quasi-stationary distribution and of the expected time to extinction from the state one and from quasi-stationarity for the stochastic logistic SIS model. The approximations are derived separately in three different parameter regions, and then combined into a uniform approximation across all three regions. Subsequently, the results are used to derive thresholds as functions of the population size N.

Dettagli sul prodotto

• Autori: Ingemar Nasell, Ingemar Nåsell
• Editore: Springer, Berlin
• Lingue: Inglese
• Formato: Tascabile
• Pubblicazione: 31.07.2011
• EAN: 9783642205293
• ISBN: 978-3-642-20529-3
• Pagine: 199
• Dimensioni: 157 mm x 235 mm x 13 mm
• Peso: 375 g
• Illustrazioni: XI, 199 p. 10 illus. in color.
• Serie: Lecture Notes in Mathematics; Lecture Notes in Mathematics / Mathematical Biosciences Subseries; Mathematical Biosciences Subseries; Lecture Notes in Mathematics; Mathematical Biosciences Subseries
• Categorie: Scienze naturali, medicina, informatica, tecnica > Matematica > Teoria delle probabilità, stocastica, statistica matematica; B, Biowissenschaften, allgemein, Life Sciences, Mathematics and Statistics, Life sciences: general issues, Probability Theory and Stochastic Processes, Probabilities, Stochastics, Probability Theory, Life Sciences, general