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|Type:||Artigo de periódico|
|Title:||The center-focus problem and reversibility|
|Abstract:||In this paper we discuss the relation between time-reversibility and the center/focus problem. We show the following: for any analytic planar system X, if j(1)X, the one-jet of X, is conjugated to (-y, x) then X is analytically time-reversible if and only if it is a center; if j(1)X is conjugated to (y, 0), then some sufficient and necessary conditions for X to have a center are given. In particular, the reversibility of certain types of polynomial vector Fields is studied. (C) 2001 Academic Press.|
|Editor:||Academic Press Inc|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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