Y-homeomorphism - meaning and definition. What is Y-homeomorphism
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What (who) is Y-homeomorphism - definition


Y-homeomorphism         
In mathematics, the y-homeomorphism, or crosscap slide, is a special type of auto-homeomorphism in non-orientable surfaces.
Homeomorphism group         
In mathematics, particularly topology, the homeomorphism group of a topological space is the group consisting of all homeomorphisms from the space to itself with function composition as the group operation. Homeomorphism groups are very important in the theory of topological spaces and in general are examples of automorphism groups.
Ý         
LETTER OF THE LATIN ALPHABET
U+00DD; Y acute; Y with acute; ´Y; ´y
Ý (ý) is a letter of Old Norse, Old Castillian, Old Astur-Leonese, Icelandic and Faroese alphabets, as well as in Turkmen language. In Czech and Slovak languages it represents a long form of the vowel y.