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visits member for 3 years, 9 months
seen Sep 27 '13 at 17:51

Math Grad Student


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
17
comment Do complex numbers really exist?
Whoa! First to 100! Congrats!
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
May
17
revised Lifting maps of quotient modules
deleted 4 characters in body
May
17
comment Lifting maps of quotient modules
Right again... sorry.
May
17
revised Lifting maps of quotient modules
added 10 characters in body
May
17
comment Lifting maps of quotient modules
Both maps are morphisms in $R$-mod.
May
17
comment Lifting maps of quotient modules
@Jack Thanks, you are right, $\bar{R}$ is not unital. I am not sure what structure you are asking about though.
May
17
asked Lifting maps of quotient modules