Geodesic
Moore G-Spaces Which are not Co-Hopf G-Spaces
Canadian mathematical bulletin, Tome 32 (1989) no. 3, pp. 365-368

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Let G be a finite group. By a Moore G-space we mean a G-space X such that for each subgroup H of G the fixed point space XH is a simply connected Moore space of type (MH,n), where MH is an abelian group depending on H, and n is a fixed integer. By a co-Hopf G-space we mean a G-space with a G-equivariant comultiplication. In this note it is shown that, in contrast to the non-equivariant case, there exist Moore G-spaces which are not co-Hopf G-spaces. 
Doman, Ryszard. Moore G-Spaces Which are not Co-Hopf G-Spaces. Canadian mathematical bulletin, Tome 32 (1989) no. 3, pp. 365-368. doi: 10.4153/CMB-1989-053-9
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