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Two-fold theorem on Fréchetness of products
Czechoslovak Mathematical Journal, Tome 49 (1999) no. 2, pp. 421-429 Cet article a éte moissonné depuis la source Czech Digital Mathematics Library

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A refined common generalization of known theorems (Arhangel’skii, Michael, Popov and Rančin) on the Fréchetness of products is proved. A new characterization, in terms of products, of strongly Fréchet topologies is provided.
A refined common generalization of known theorems (Arhangel’skii, Michael, Popov and Rančin) on the Fréchetness of products is proved. A new characterization, in terms of products, of strongly Fréchet topologies is provided.
Classification : 54A20, 54B10, 54D50, 54D55, 54G15
Keywords: $\alpha_3$; $\alpha_4$; $\beta_3$; $\beta_4$ spaces; $\Phi$-space; product space; sequential space; sequentially subtransverse; strongly Fréchet; transverse 
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Dolecki, S.; Nogura, T. Two-fold theorem on Fréchetness of products. Czechoslovak Mathematical Journal, Tome 49 (1999) no. 2, pp. 421-429. http://geodesic.mathdoc.fr/item/CMJ_1999_49_2_a16/

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