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Название: Hopf spaces
Автор: Zabrodsky A.
Possibly more than any other field in mathematics algebraic topology
contains a vast amount of relatively simple facts, clusters of small
theorems and intuitive observations. Naturally, these include many
folklore-type theorems which do not appear in the literature.
quite likely that as many theorems in algebraic topology have appeared
verbally in universities' common rooms as have appeared in print in the
these fundamentals to light in print from time to time.
It is therefore essential to bring some of these fundamentals to light in print from time to time.