2,557 reputation
1830
bio website
location Kansas
age 28
visits member for 4 years, 5 months
seen Nov 26 at 17:03

Math Grad Student


Oct
11
awarded  Nice Question
Sep
23
awarded  Nice Question
Jul
28
awarded  Nice Answer
Jul
27
answered Direct sum of an algebra and its opposite
Jul
23
comment Equalizers in category of sets/graphs — a couple of examples
Using latex and a more standard mathematical presentation style. In particular, don't be afraid to write sentences.
Jul
21
awarded  Yearling
Jul
20
comment What is the name of the vertical bar?
@Zhen Lin, I would say that depends on the usage, I have no spacing issues for using it in set-builder notation or restrictions. Moreover you forgot to mention the \left. However we are deviating quite far from the point of the question. My comment was meant as a joke.
Jul
20
comment What is the name of the vertical bar?
it's called \mid, at least if you are a TeXnitian. :)
Jul
8
comment Direct sum of an algebra and its opposite
@Pete L. Clark, yes, this is definitely the thrust of my question, why the heck is it the universal enveloping algebra of anything?
Jul
7
accepted Direct sum of an algebra and its opposite
Jul
7
comment Direct sum of an algebra and its opposite
ok great. Thanks.
Jul
7
revised Direct sum of an algebra and its opposite
added 78 characters in body
Jul
7
comment Direct sum of an algebra and its opposite
Yes, that is a good point about dimensionality. Can you point me to a statement of this so I can at least remember what I was thinking of?
Jul
7
asked Direct sum of an algebra and its opposite
Jul
6
comment How to draw a weight diagram?
You have a lot of questions here, and maybe someone will come along and answer them all systematically for your specific example(though you don't tell us what n is), but let me just say this: take a look at chapter 12 of Fulton and Harris, books.google.com/…, I think that reading through this example will make this more clear.
Jun
9
comment Mathematical precise definition of a PDE being elliptic, parabolic or hyperbolic
@Willie Wong, You're awesome.
Jun
4
comment What is the connection between Grothendieck's Differential Operators and Hochschild Cohomology
Sorry, but I have a few more questions, first is $\mathcal{O}$ the same as $A$ here? Second, what do you mean de Rham of $A$? If you mean de Rham on the variety with coordinate ring $A$, then how is that different than the topological de Rham. Sorry if these questions are stupid.
Jun
4
comment What is the connection between Grothendieck's Differential Operators and Hochschild Cohomology
hehe, thanks @Pete L. Clark and @Mariano, the edit was what I intended. :)
Jun
4
asked What is the connection between Grothendieck's Differential Operators and Hochschild Cohomology
May
21
awarded  Good Answer