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math.GR2017
Finitary approximations of groups and their applications
Andreas Thom
In these notes we will survey recent results on various finitary approximation properties of infinite groups. We will discuss various restrictions on groups that are approximated f…
math.FA2017★ 1 cited
On Projections of Free Semialgebraic Sets
Tom Drescher, Tim Netzer, Andreas Thom
An important result in real algebraic geometry is the projection theorem: every projection of a semialgebraic set is again semialgebraic. This theorem and some of its conclusions l…
math.GR2017
A note on the normal subgroup lattice of ultraproducts of finite quasisimple groups
Jakob Schneider, Andreas Thom
In [A. Stolz and A. Thom, On the lattice of normal subgroups in ultraproducts of compact simple groups, PLMS 108(1), 2014] it was stated that the lattice of normal subgroups of an…