Autor:	Alejandro Illanes
Rok vydání:	1993
Předmět:	Combinatorics Discrete mathematics Monotone polygon Whitney conditions Dendroid Geometry and Topology Space (mathematics) Mathematics Whitney embedding theorem
Zdroj:	Topology and its Applications. 53(3):271-288
ISSN:	0166-8641
DOI:	10.1016/0166-8641(93)90121-s
Popis:	Some equivalent conditions on a Whitney map for 2 X to be open (or monotone) are given. It is shown that the existence of a monotone Whitney map for 2 X implies that the space of Whitney levels in 2 X is pathwise connected. Three examples showing that the contractibility of a dendroid X is independent of the existence of open (or monotone) Whitney maps for 2 X are given and some questions concerning this subject are asked.
Databáze:	OpenAIRE
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