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JOURNALS // Matematicheskii Sbornik // Archive

Mat. Sb., 2024 Volume 215, Number 9, Pages 56–76 (Mi sm10038)

Every group is the group of self-homotopy equivalences of finite dimensional $\mathrm{CW}$-complex

M. Benkhalifa

Department of Mathematics, College of Sciences, University of Sharjah, Sharjah, United Arab Emirates

Abstract: We prove that any group $G$ occurs as $\mathcal{E}(X)$, where $X$ is a $\mathrm{CW}$-complex of finite dimension and $\mathcal{E}(X)$ denotes its group of self-homotopy equivalences. Thus, we generalize a well-known theorem due to Costoya and Viruel [9] asserting that any finite group occurs as $\mathcal{E}(X)$, where $X$ is rational elliptic space.
Bibliography: 12 titles.

Keywords: Kahn's realisability problem of groups, group of homotopy self-equivalences, Anick's $R$-local homotopy theory.

MSC: 55P10

Received: 24.11.2023 and 06.04.2024

DOI: 10.4213/sm10038


 English version:
Sbornik: Mathematics, 2024, 215:9, 1182–1201

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© Steklov Math. Inst. of RAS, 2025