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Mod 2 degree and a generalized No Retraction Theorem
Author(s) -
Bloch Ethan D.
Publication year - 2006
Publication title -
mathematische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 50
eISSN - 1522-2616
pISSN - 0025-584X
DOI - 10.1002/mana.200310373
Subject(s) - lemma (botany) , mathematics , mathematical proof , degree (music) , simple (philosophy) , combinatorics , discrete mathematics , pure mathematics , geometry , physics , acoustics , ecology , philosophy , poaceae , epistemology , biology
We provide elementary proofs of generalized versions of the No Retraction Theorem and Sperner's Lemma, and a simple definition of mod 2 degree of certain maps. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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