Last-modified: 2010-07-30 (金) 17:40:10
- A region U is said to be self-compact if any infinite set of points in U has at least one limit point in U.
- Veblen, O. and Whitehead, J.H.C. ,A set of axioms for differential geometry., [J] Proc. Natl. Acad. Sci. USA 17, 551-561 (1931).