bio  website  metis.ms.unimelb.edu.au/… 

location  Melbourne, Australia  
age  32  
visits  member for  2 years, 8 months 
seen  2 hours ago  
stats  profile views  548 
I am a low dimensional topologist.
1d

comment 
Automorphism of genus 2 surface with 5 fixed points
@WillSawin Thanks! Although if $S^2(2,2,2,2,2)$ exists as a cyclic quotient, the selfhomeomorphism on the genus two surface wouldn't correspond to an involution, but rather a symmetry of order 4. Can that be ruled out as well? 
1d

answered  Automorphism of genus 2 surface with 5 fixed points 
Jun 12 
reviewed  Reviewed Calculating minimum number of comparisons to ensure 1 and only 1 value set 
Jun 12 
comment 
Calculating minimum number of comparisons to ensure 1 and only 1 value set
Hi Kris, I think you might want to post this on a software SE. 
Jun 11 
reviewed  Approve Lie Algebra, counterexample 
May 22 
reviewed  Approve Is g( ) rational if it looks that way on a large rational subset? 
May 19 
reviewed  Approve When the Lovász thetafunction saturates its upper bound 
May 18 
awarded  Deputy 
May 14 
reviewed  Reviewed Why do people use “formal calculation” to describe informal calculations? 
May 11 
reviewed  Approve Does the following type of Gronwall inequality hold? 
May 6 
comment 
Kleinian groups containing an isomorphic copy of itself
@DannyNguyen I don't understand your comment and I would be grateful if you could help me clear up my misunderstandings. First, you have dropped the condition that the subgroup be proper, which seems essential to the definition of coHopfian. Second, I don't follow why "is" is in bold in your correction. 
May 3 
reviewed  Approve Vanishing of $\hat{A}$ genus and positive scalar curvature 
Apr 30 
reviewed  Reviewed how wiggly is a generic level set? 
Apr 30 
reviewed  Reviewed Irreducibles in polynomial rings 
Apr 29 
comment 
3manifolds with isomorphic fundamental groups
Thanks Henry. Isn't assumed throughout your paper that you guys discuss only oriented 3manifolds? I was really hoping to find a reference that deals with the nonorientable case as well. I fully understand why one would like to avoid the pathologies of nonorientable manifolds especially when considering virtual properties. However, I wondering if anyone has a nice approach to 3manifolds with the same fundamental group regardless of orientablity. 
Apr 29 
comment 
3manifolds with isomorphic fundamental groups
I think you might want to be a little careful citing Scott. He also requires that the manifolds are closed, right? There are examples of nonhomomorphic Seifert fibered spaces over the disk with two exceptional fibers that are nonhomeomorphic. D^2(3,1)(3,1) and D^2(3,1)(3,2) form a pair of these type of examples. One can see they are not homeomorphic by performing surgery along the peripheral curve that bounds an annulus, which results in L(3,1)#L(3,1) and L(3,1)#L(3,2). 
Apr 29 
asked  3manifolds with isomorphic fundamental groups 
Apr 29 
reviewed  No Action Needed Self adjoint operator and vertex conditions in quantum graphs 
Apr 29 
reviewed  Reviewed DyerLashof operations and the homology of GL_n 
Apr 27 
reviewed  Approve ideals of polynomial ring with complex number coefficients 