Continuity of a homomorphism on commutative subalgebras is not sufficient for continuity

Publishing house / Journals and Serials / Studia Mathematica / All issues

Bohdan Aniszczyk, Ryszard Frankiewicz, Czesław Ryll-Nardzewski Studia Mathematica 98 (1991), 247-248 DOI: 10.4064/sm-98-3-247-248