Research output: Contribution to journal › Article › peer-review
Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Every metric space of weight admits a condensation onto a Banach space
AU - Osipov, A. V.
AU - Pytkeev, E. G.
N1 - The authors would like to thank the referee for careful reading and valuable comments.
PY - 2023/5
Y1 - 2023/5
N2 - In this paper, we have proved that for each cardinal number λ such that λ=λℵ0 a metric space of weight λ admits a bijective continuous mapping onto a Banach space of weight λ. Then, we get that every metric space of weight continuum admits a bijective continuous mapping onto the Hilbert cube. This resolves the famous Banach's Problem (when does a metric (possibly Banach) space X admit a bijective continuous mapping onto a compact metric space?) in the class of metric spaces of weight continuum. Also we get that every metric space of weight λ=λℵ0 admits a bijective continuous mapping onto a Hausdorff compact space. This resolves the Alexandroff Problem (when does a Hausdorff space X admit a bijective continuous mapping onto a Hausdorff compact space?) in the class of metric spaces of weight λ=λℵ0. © 2023 Elsevier B.V.
AB - In this paper, we have proved that for each cardinal number λ such that λ=λℵ0 a metric space of weight λ admits a bijective continuous mapping onto a Banach space of weight λ. Then, we get that every metric space of weight continuum admits a bijective continuous mapping onto the Hilbert cube. This resolves the famous Banach's Problem (when does a metric (possibly Banach) space X admit a bijective continuous mapping onto a compact metric space?) in the class of metric spaces of weight continuum. Also we get that every metric space of weight λ=λℵ0 admits a bijective continuous mapping onto a Hausdorff compact space. This resolves the Alexandroff Problem (when does a Hausdorff space X admit a bijective continuous mapping onto a Hausdorff compact space?) in the class of metric spaces of weight λ=λℵ0. © 2023 Elsevier B.V.
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U2 - 10.1016/j.topol.2023.108486
DO - 10.1016/j.topol.2023.108486
M3 - Article
JO - Topology and its Applications
JF - Topology and its Applications
SN - 0166-8641
IS - 330
M1 - 108486
ER -
ID: 36195375