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8h
reviewed Reject Is there an image for you that epitomizes mathematics?
1d
comment $C^{1,2}$ regularity of (weak) solutions to the heat equation
It would sure be nice if PDEs had maximal regularity in C spaces. It is also well known that they do not. So you will have to assume more about f, e.g. Holder continuity.
2d
reviewed Approve chromatic polynomial of G - Join graph
2d
answered Analytic continuation of a specific integral with respect to a parameter
Apr
17
reviewed Approve solvable-groups tag wiki
Apr
17
reviewed Approve solvable-groups tag wiki excerpt
Apr
16
revised Bases of the special form
fixed grammar
Apr
11
comment An H2 estimate for Helmholtz equation
This boils down to showing that the Dirichlet to Neumann operator does not have imaginary eigenvalues, which follows easily from a standard energy estimate. This is not a research level question.
Apr
10
comment Convolution Integral involving an unknown function
It is a one-sided integral, so it cannot be interpreted as a Cauchy principal value. What am I missing?
Apr
10
comment Convolution Integral involving an unknown function
Isn't there a problem with convergence of the integral at s=t?
Apr
6
comment Ill-posedness of a generalized heat equation
Why do you "need to" prove this?
Apr
6
awarded  Nice Answer
Apr
4
comment Stability of a nonlinear heat PDE
I suspect that in the physical application from which this came the initial condition for u is positive. You will have to use that to get stability.
Apr
4
answered is every element in a C* algebra a product of normal elements?
Mar
23
revised Euler Schemes in Stochastic Differential Equations
added missing + sign
Mar
14
comment Eigenvalue-related statements
This looks a lot like homework. Voting to close.
Feb
23
comment When do you use “s” apostrophe to refer to authors ($e.g.$ of inequalities)?
@TobiasKildetoft: It should be the Cauchy-Schwarz (not Schwartz) inequality.
Feb
22
comment Continuous inclusions Sobolev theorem, question
Looking up your own references is good exercise. Voting to close as not a research level question.
Feb
19
reviewed Approve kahler-einstein-metric tag wiki excerpt
Feb
17
answered Urysohn type cut off function