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  • 39 votes cast
Nov
30
awarded  Popular Question
Nov
19
awarded  Nice Question
Nov
5
comment SU(2) invariant Kahler metrics on products of Riemann surfaces
I am giving the SU(2) action. It acts trivially on X and in the usual manner on $\mathbb{P}^1$.
Nov
5
asked SU(2) invariant Kahler metrics on products of Riemann surfaces
Oct
14
awarded  Nice Question
May
29
comment Most harmful heuristic?
I agree with Scott Aaronson. In fact, the physicist way of defining tensors as things that change correctly under coordinates gives a nice way to define tensor fields on manifolds (Simply a smooth collection of multi-index beasts on different open sets such that on the intersection they are related by an appropriate transformation (the transition functions of the tensor bundle)). I am not sure if this "heuristic" actually gives rise to wrong intuitions.
May
19
awarded  Nice Question
Mar
9
accepted Convexity of a (non-symmetric) function of matrices
Mar
9
comment Convexity of a (non-symmetric) function of matrices
Yes. I forgot to add the assumption of semidefiniteness.
Mar
9
revised Convexity of a (non-symmetric) function of matrices
Added the hypothesis of semidefiniteness.
Mar
9
asked Convexity of a (non-symmetric) function of matrices
Feb
25
accepted Matrix-convexity of inverse of the cofactor matrix
Feb
16
comment Matrix-convexity of inverse of the cofactor matrix
Thanks. It arose in proving uniform estimates for an elliptic Monge-Ampere type PDE.
Feb
13
comment Matrix-convexity of inverse of the cofactor matrix
Indeed. I corrected that.
Feb
13
revised Matrix-convexity of inverse of the cofactor matrix
added 5 characters in body
Feb
13
asked Matrix-convexity of inverse of the cofactor matrix
Feb
9
awarded  Yearling
Feb
9
accepted Convexity of a function of matrices
Feb
9
asked Convexity of a function of matrices
Feb
9
accepted Geometric mean of two matrices