20,715 reputation
583160
bio website math.rice.edu/~andyp
location Houston, TX
age 35
visits member for 5 years
seen 10 hours ago
associate professor at Rice University

1d
comment How to best fit for linear vs sinusoidal curve
MO is not for homework and is intended for questions at the mathematics PhD level and above. I've voted to close.
1d
comment About Gödel's incompleteness theorems
This is off-topic and I've voted to close.
Oct
22
comment First-order nonlinear ordinary differential eqauation
MO is not for homework and is intended for questions at the mathematics PhD student level and above. I've voted to close.
Oct
18
comment Stronger than Gerretsen
MO is not for puzzles (also, the question makes no sense as written: what is $p$ and $r$ and $R$?). I've voted to close.
Oct
18
comment Topological conjugacy
MO is not for homework.
Oct
14
awarded  Yearling
Sep
30
awarded  Explainer
Sep
17
awarded  Notable Question
Aug
31
comment Top specialized journals
@BenoîtKloeckner : They have great ambitions, but I think that at this point they have not reached them (and who knows what will happen when they start charging authors to publish in them).
Aug
25
awarded  Enlightened
Aug
25
awarded  Nice Answer
Aug
24
comment Second homology of mapping class group of genus 3
Thanks Kevin!!!
Aug
24
comment Help with my research topic
While I am sorry you are having trouble, questions of the form "give me a thesis topic" are off-topic and I have voted to close.
Aug
24
comment Second homology of mapping class group of genus 3
Sorry, typed this on my phone and will not have access to a computer soon. Can someone fix the arxiv link and the tex? Thanks!
Aug
24
comment Second homology of mapping class group of genus 3
@ThiKu : while I think that Ivanov's survey is great, it is pretty dated at this point (eg it predates Madsen-Weiss).
Aug
24
answered Second homology of mapping class group of genus 3
Aug
23
comment Why calculus textbooks do not include the natural integration constants in the tables of integrals?
Why on earth would anyone want to do this? It solves no problem, is confusing, and is entirely arbitrary (I could write down any number of other conventions that are equally "natural" and give different answers). No offense, but this is a totally absurd suggestion. It's also not really a research-level math question, so I have voted to close.
Aug
22
comment How does the Atiyah-Singer index theorem in a relative setting related to “ringed spaces and pseudocoherent complexes of finite tor-dimension”?
It would be helpful if you would give us a link to the article and tell us who was being interviewed.
Aug
20
awarded  Nice Answer
Aug
3
comment Does every compact manifold exhibit an almost global chart
@DavidSpeyer : Modifying a Morse function such that it has only one local max and min (or, equivalently, modifying a handle decomposition such that it has exactly one $0$-handle and one $n$-handle) is pretty standard. For instance, it is one of the first steps in a proof of the h-cobordism theorem, so can be found in any book that proves that (e.g. Milnor's "Lectures on the h-cobordism theorem"). Probably Ranicki's "Algebraic and Geometry Surgery" also contains a proof.