411 REFERENCE · Wiktionary
H-space
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
The H was suggested by Jean-Pierre Serre in recognition of the influence exerted on the subject by Heinz Hopf.
Noun
en topology A topological space X (generally assumed to be connected) together with a continuous map μ : X × X → X with an identity element e such that μ(e, x) = μ(x, e) = x for all x in X.
Anagrams
en acehps Cephas Pechas Pesach Speach chapes cheaps speach
en eponyms