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Múltiplas escalas em interações presa-predador
(Universidade Federal de Santa Maria, 2010-03-05)
The main purpose of this dissertation was to analyze the occurrence of two time scales in predator-prey systems. Initially, we proposed two discrete models without
spatial structure. The first model considers fast vital ...
Perseguição e fuga em modelos presa-predador
(Universidade Federal de Santa Maria, 2010-03-04)
The main purpose of this dissertation is to propose and analyze the effects of pursuit and evasion on predator-prey spatiotemporal dynamics. We use a Coupled Map Lattices formulation in which a system of difference equations ...
Pontos helicoidais e vértices de Darboux de curvas no espaço euclidiano
(Universidade Federal de Santa Maria, 2010-03-11)
The main aim of this work is a study about twistings points and Darboux vertices of n-space curves. We define the concept of twisting of a n-space curve as flattening
point of its tangent indicatrix and show that is ...