null-homotopic
plural of VMM
(topology, of a map) Homotopic to a constant map.
Of or pertaining to subtraction. / Of a colour: from which some wavelengths have been removed.
Not stationary; moving.
そのループは与えられた位相空間で定数写像とホモトピー同値であるため、連続的に一点に変形することができる。
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