User:CaptchaSamurai/sandbox/Adam Henryk Torunczyk
Adam Henryk Toruńczyk (21 October 1945) is a Polish Mathematician specializing in topology and functional analysis.[1] In particular he generalized Anderson–Kadec theorem by proving that Banach spaces are homeomorphic if and only if they have the same density character, the minimum cardinality of a dense subset.[2]
References/Notes and references
[edit]Always cite your sources! No original research!
- ^ "Nowa Nauka Polska". nauka-polska.pl. Retrieved 2023-11-02.
- ^ Toruńczyk, H. (1981). "Characterizing Hilbert space topology". Fundamenta Mathematicae. 111 (3): 247–262. doi:10.4064/fm-111-3-247-262. ISSN 0016-2736.