刊名:Journal of Mathematical Analysis and Applications
出版年:2016
出版时间:1 February 2016
年:2016
卷:434
期:1
页码:12-19
全文大小:328 K
文摘
The separable quotient problem remains open for Banach spaces. The recent solution for barrelled spaces counters Saxon–Narayanaswami's solution for (LF)-spaces. W.J. Robertson proposed properly separable quotients. We fully answer her quarter-century-old question, proving (LF)-spaces admit properly separable quotients with rare exception. Corollary: Every (LF)-space except φ admits properly separable quotients if and only if Banach's classic separable quotient problem has a positive solution.