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Addition to the Note: Closed Graph and Open Mapping Theorems in certain Topologically Complete Spaces
Author(s) -
Pettis B. J.
Publication year - 1975
Publication title -
bulletin of the london mathematical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.396
H-Index - 48
eISSN - 1469-2120
pISSN - 0024-6093
DOI - 10.1112/blms/7.2.175
Subject(s) - mathematics , graph , combinatorics , pure mathematics , discrete mathematics
Any subgroup H non‐meagre in itself is closed if it is Borel or if it is almost open in H . This implies closed subgroup theorems of Mazur and Sternbach, Weston, and the author.