Sobolev functions on closed subsets of the real line
نویسندگان
چکیده
منابع مشابه
On sequentially closed subsets of the real line in ZF
(i) CAC iff every countable product of sequential metric spaces (sequentially closed subsets are closed) is a sequential metric space iff every complete metric space is Cantor complete. (ii) Every infinite subset X of R has a countably infinite subset iff every infinite sequentially closed subset of R includes an infinite closed subset. (iii) The statement “R is sequential” is equivalent to eac...
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ژورنال
عنوان ژورنال: Journal of Approximation Theory
سال: 2020
ISSN: 0021-9045
DOI: 10.1016/j.jat.2019.105327