Using equivariant obstruction theory we construct equivariant maps from certain universal spaces to representation spheres for cyclic groups, products of elementary Abelian groups and dihedral groups. Restricting them to finite skeleta constructs equivariant maps between spaces which are related to the topological Tverberg conjecture. This answers negatively a question of ?zaydin posed in relation to weaker versions of the same conjecture. Further, it also has consequences for Borsuk–Ulam properties of representations of cyclic and dihedral groups.
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