Characterization of MorseSmale isotopy classes on surfaces
Luíz Fernando, Cristine da Rocha
Abstract
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Luíz Fernando, Cristine da Rocha
Abstract
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Abstract In this paper we use Thurston's work on the dynamics of diffeomorphisms on surfaces to show that a diffeomorphism ƒ on a surface is isotopic to a Morse- Smale one if and only if the growth rate of the length of the words representing elements of the fundamental group under iteration by ƒ is one. Morse-Smale isotopy classes are also shown to be the same as Nielsen's algebraically finite type.
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Abstract In this paper we use Thurston's work on the dynamics of diffeomorphisms on surfaces to show that a diffeomorphism ƒ on a surface is isotopic to a Morse- Smale one if and only if the growth rate of the length of the words representing elements of the fundamental group under iteration by ƒ is one. Morse-Smale isotopy classes are also shown to be the same as Nielsen's algebraically finite type.
Key concepts: Isotopy, Diffeomorphism, Mathematics, Morse code, Pure mathematics, Morse theory, Surface (topology), Characterization (materials science)