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SUMMARY:Robert Kropholler (Universität Münster)
DTSTART:20210510T080000Z
DTEND:20210510T090000Z
DTSTAMP:20260423T021358Z
UID:SiN/19
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/SiN/19/">Gro
 ups of type FP_2 over fields but not over the integers</a>\nby Robert Krop
 holler (Universität Münster) as part of Symmetry in Newcastle\n\n\nAbstr
 act\nBeing of type $\\mathop{FP}_2$ is an algebraic shadow of being finite
 ly presented. A long standing question was whether these two classes are e
 quivalent. This was shown to be false in the work of Bestvina and Brady. M
 ore recently\, there are many new examples of groups of type $\\mathop{FP}
 _2$ coming with various interesting properties. I will begin with an intro
 duction to the finiteness property $\\mathop{FP}_2$. I will end by giving 
 a construction to find groups that are of type $\\mathop{FP}_2(F)$ for all
  fields $F$ but not $\\mathop{FP}_2(\\mathbb{Z})$\n
LOCATION:https://researchseminars.org/talk/SiN/19/
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