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JOURNALS // Trudy Instituta Matematiki i Mekhaniki UrO RAN // Archive

Trudy Inst. Mat. i Mekh. UrO RAN, 2011 Volume 17, Number 4, Pages 209–221 (Mi timm766)

Some properties of the spaces $T(k,\tau)$ and $S(k,\tau)$

S. V. Medvedev

South Ural State University

Abstract: The properties of two families of $h$-homogeneous Borel sets $\{T(k,\tau)\colon\omega\leq\tau\leq k\}$ and $\{S(k,\tau)\colon\omega\leq\tau\leq k\}$ are studied. The sets of the former family are obtained as the result of taking the union of the Baire space $B(k)$ and the $\sigma$-discrete space $Q(k)$, while the sets of the latter family are obtained as the result of taking the union of the spaces $B(k)$ and $Q(k)\times C$. We prove theorems on the embedding of these sets into absolute Souslin sets as closed subsets.

Keywords: $h$-homogeneous space, Souslin set, $\sigma LW({<}k)$-space, Baire space, embedding, homeomorphism.

UDC: 515.128

Received: 10.07.2010



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