訂正日: 2006/10/20訂正理由: -訂正箇所: 引用文献情報訂正内容: Wrong : 1) S.P. Franklin, Spaces in which sequences suffice, Fund. Math., 57 (1965), 107-115. 2) N. Lašnev, Closed image of metric spaces, Dokl. Akad. Nauk SSSR, 170 (1966), 505-507 (Russian). English Transl.: Soviet Math. Dokl., 7 (1966), 1219-1221. 3) V.I. Malyhin, On countable space having no bicompactifications of countable tightness, Dokl. Akad. Nauk SSSR, 206 (1972), 1293-1296 (Russian). English Transl.: Soviet Math. Dokl., 13 (1972), 1407-1411. 4) E. Michael, Bi-sequential spaces and bi-k-spaces, Pittsburgh International Topology Conference, 1970. 5) T. Nogura, The subsequentiality of product spaces, J. Math. Soc. Japan, 31(1979), 391-399. 6) Y. Tanaka, Products of sequential spaces, Proc, Amer. Math. Soc., 54 (1976), 371-375.
Right : [1] S. P. Franklin, Spaces in which sequences suffice, Fund. Math., 57 (1965), 107-115. [2] N. Lašnev, Closed image of metric spaces, Dokl. Akad. Nauk SSSR, 170 (1966), 505-507 (Russian). English Transl.: Soviet Math. Dokl., 7 (1966), 1219-1221. [3] V. I. Malyhin, On countable space having no bicompactifications of countable tightness, Dokl. Akad. Nauk SSSR, 206 (1972), 1293-1296 (Russian). English Transl.: Soviet Math. Dokl., 13 (1972), 1407-1411. [4] E. Michael, Bi-sequential spaces and bi-k-spaces, Pittsburgh International Topology Conference, 1970. [5] T. Nogura, The subsequentiality of product spaces, J. Math. Soc. Japan, 31 (1979), 391-399. [6] Y. Tanaka, Products of sequential spaces, Proc. Amer. Math. Soc., 54 (1976), 371-375.