8 papers
The cohomology of right angled Artin groups with group ring coefficients
Craig Jensen, John Meier
We give an explicit formula for the cohomology of a right angled Artin group with group ring coefficients in terms of the cohomology of its defining flag complex.
On automorphism groups of free products of finite groups, I: Proper Actions
Yuqing Chen, Henry Glover, Craig Jensen
If is a free product of finite groups, let denote all (necessarily symmetric) automorphisms of that do not permute factors in the free product. We show that a M…
Cohomoloy of
Craig A. Jensen
We calculate the homology of automorphism groups of free groups in various cases. The author would like to thank his thesis advisor Karen Vogtmann.
Cohomology of in the p-rank two case
Craig A. Jensen
For odd primes p, we examine , the Farrell cohomology of the group of automorphisms of a free group on generators, with c…
Geometry for palindromic automorphism groups of free groups
Henry H Glover, Craig A. Jensen
We examine the palindromic automorphism group of a free group , a group first defined by Collins which is related to hyperelliptic involutions of mapping class group…
Contractibility of fixed point sets of auter space
Craig A. Jensen
We show that for every finite subgroup of , the fixed point subcomplex is contractible, where is the free group on letters and is the spine of…