Jason Polak

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I am a PhD student at McGill University in mathematics and I work on the Hitchin fibration. I also like homological algebra, and nonconstructive proofs.


35 Answers

newest activity votes
22
Proving that $\mathbb{Z}[x]$ and $\mathbb{Q}[x]$ are not isomorphic.
may 5 at 23:05
10
What is happening in a linear algebra computation?
mar 12 '11 at 19:25
8
Projective vs Injective Resolutions
feb 22 at 21:50
6
Strategies to prevent my math abilities from fading?
dec 5 at 22:16
6
How many different basis' exist for an n-dimensional vector space in mod 2?
sep 30 '11 at 21:43
6
Introduction to Bourbaki structures, and their relation to category theory
mar 8 '11 at 16:31
5
How to start learning knot theory?
may 15 at 21:37
5
Struggling with “technique-based” mathematics, can people relate to this? And what, if anything, can be done about it?
mar 3 at 3:37
4
Why should “graph theory be part of the education of every student of mathematics”?
apr 26 at 22:25
4
Are there real world applications of finite group theory?
mar 8 at 2:17
4
Question in proving Nakayama's Lemma
dec 21 at 23:01
4
Is there any deep connection between algebraic topology and homological algebra on rings?
dec 11 at 21:42
4
Finite dimensional algebra over field
oct 3 at 19:42
4
What does $Tor_{R}^n(M,N)$ represent?
oct 1 at 1:14
3
Clarification Regarding the Tor Functor involved in a Finite Exact Sequence
feb 25 at 1:13
3
Distance and compact sets
oct 31 at 19:41
3
Differentiable at a point
mar 1 '11 at 19:53
2
Intuitive meaning of Exact Sequence
jun 13 at 16:52
2
Introduction to Abstract Harmonic Analysis, reference suggestions?
may 13 at 23:11
2
What is the reason direct product of injective modules are injective, while direct sum not necessarily?
dec 11 at 22:30
2
Confused about Weibel proof
jul 23 '11 at 3:38
2
Presheaf on a topological space
mar 17 '11 at 21:04
2
How many countable graphs are there?
mar 16 '11 at 14:29
2
Mathematics problems for very young children?
mar 1 '11 at 19:59
1
Proving that $\mathbb{Z}[x]$ and $\mathbb{Q}[x]$ are not isomorphic.
may 7 at 19:32
1
Homotopy equivalent chain complexes
mar 8 at 0:53
1
Injective modules with trivial group action
dec 12 at 23:14
1
Prove that $(n\mathbb Z, +, \times )$ are the only subrings of $(\mathbb Z, +, \times)$
nov 9 at 1:00
1
Suppose I said “$X$ spans $W$”…
oct 17 at 1:50
1
A problem about total variation of complex measure
mar 17 '11 at 15:39
1 2