3 citations · 5 across the 3 of their papers we have counts for
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math.GT2008★ 1 cited
On finite simple and nonsolvable groups acting on closed 4-manifolds
Mattia Mecchia, Bruno Zimmermann
We show that the only finite nonabelian simple groups which admit a locally linear, homologically trivial action on a closed simply connected 4-manifold (or on a 4-manifold wit…
math.GT2008★ 3 cited
A note on minimal finite quotients of mapping class groups
Bruno P. Zimmermann
We prove that the minimal nontrivial finite quotient group of the mapping class group M_g of a closed orientable surface of genus g is the symplectic group PSp(2g,Z_2), for g = 3 a…
math.GT2007★ 1 cited
On the determination of knots by their cyclic unbranched coverings
Bruno P. Zimmermann
We show that, for any prime p, a knot K in the 3-sphere is determined by its p-fold cyclic unbranched covering. We also investigate when the m-fold cyclic unbranched covering of a…