bio  website  math.berkeley.edu/~cgerig 

location  UC Berkeley  
age  25  
visits  member for  3 years, 3 months 
seen  6 hours ago  
stats  profile views  5,377 
Undergrad: Allen Hatcher's recommendation got me accepted into Cornell (I learned Algebraic Topology through his book in high school, along with some email correspondences). But I majored in Engineering Physics, and did experimental research on gravity. Luckily, Ken Brown took me under his wing and provided weekly meetings to understand Group Cohomology.
Grad: I started my PhD in experimental atomic physics at Berkeley, but quit to do math. I am now a 2ndyear student of Michael Hutchings, wooo!
17h

revised 
Untwisting the Cohomology with Twisted Coefficients
added 37 characters in body 
17h

awarded  Disciplined 
Apr 14 
comment 
Finite group acting on sphere
Subsequently, unless I'm thinking too quickly again, $\mathbb{Z}_3\times\mathbb{Z}_3$ acts similarly and provides the smallest oddorder counterexample to the question. 
Apr 14 
comment 
Finite group acting on sphere
Ah good catch. $\mathbb{Z}_2\times\mathbb{Z}_2$ acts on $S^2$ by rotation through two orthogonal axes (one per summand) with no fixed point, and the "4 poles" each have $\mathbb{Z}_2$stabilizer. 
Apr 14 
comment 
Finite group acting on sphere
This is a small homework exercise in an Algebraic Topology class  if a finite group $G$ acts freely on $S^{2n}$ then $G=\mathbb{Z}_2$ (using degree theory). 
Apr 12 
revised 
Shortest geodesic loop vs. shortest periodic geodesic
corrected name of my advisor :) 
Apr 11 
comment 
Genericity of maps which are transverse when restricted to a submanifold
Hirsch's Differential Topology, chapter II on transversality, Theorem 2.1(b) 
Apr 10 
reviewed  Reject suggested edit on multiplication of two ergodic and stationary processes 
Apr 5 
accepted  Extending Reeb field from contact submanifold to ambient contact manifold 
Apr 5 
revised 
Extending Reeb field from contact submanifold to ambient contact manifold
added 8 characters in body; edited title 
Apr 2 
revised 
Extending Reeb field from contact submanifold to ambient contact manifold
deleted 9 characters in body 
Apr 2 
asked  Extending Reeb field from contact submanifold to ambient contact manifold 
Mar 24 
comment 
Ricci curvature under rough convergence
@AntonPetrunin, I spoke to John Lott, who remarked that there is an ambiguity in what the OP is after. The easy case is where the manifolds are of the same dimension. But his proof can handle the case where the limiting manifold has a different dimension (and for which he is unaware of an alternative proof). 
Mar 19 
reviewed  Approve suggested edit on Largest order of automorphism group on a rooted tree? 
Mar 12 
awarded  Nice Question 
Mar 11 
reviewed  Reject suggested edit on Irreducibility of reflexive compositions of polynomials (II) 
Mar 4 
answered  YangMills flow, Ricci flow and the holonomy 
Mar 3 
reviewed  Approve suggested edit on What makes a theorem *a* “nullstellensatz.” 
Feb 26 
revised 
Integral formula for Euler class
edited body 
Feb 10 
reviewed  Approve suggested edit on Skorohod theorem (weak convergence) on a discrete setting 