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# Wydawnictwa / Czasopisma IMPAN / Fundamenta Mathematicae / Wszystkie zeszyty

## $C^1$ stability of endomorphisms on two-dimensional manifolds

### Tom 219 / 2012

Fundamenta Mathematicae 219 (2012), 37-58 MSC: Primary 37C75; Secondary 37C20. DOI: 10.4064/fm219-1-3

#### Streszczenie

A set of necessary conditions for $C^1$ stability of noninvertible maps is presented. It is proved that the conditions are sufficient for $C^1$ stability in compact oriented manifolds of dimension two. An example given by F. Przytycki in 1977 is shown to satisfy these conditions. It is the first example known of a $C^1$ stable map (noninvertible and nonexpanding) in a manifold of dimension two, while a wide class of examples are already known in every other dimension.

#### Autorzy

• J. IglesiasIMERL
Julio Herrera y Reissig 565
C.P. 11300, Montevideo, Uruguay
e-mail
• A. PortelaIMERL
Julio Herrera y Reissig 565
C.P. 11300, Montevideo, Uruguay
e-mail
• A. RovellaIMERL