Piero D'Ancona
|
Registered User
|
|
|
1d |
comment |
Approximating higher dimension step function What about $\frac{s}{(\|s\|^2+\delta)^{1/2}}$? Maybe you should state more precisely what are your requirements for the approximation |
|
Mar 28 |
comment |
A question on a variant of Hardy’s inequality. s=0, r=2n/(n-2) is Sobolev embedding. s=2, r=2 is standard Hardy. By interpolation you get all couples (s,r) in the segment joining these two points, and by boundedness of the domain you get the smaller values of r |
|
Mar 11 |
answered | Should one attack hard problems? |
|
Dec 10 |
comment |
A matrix inequality involving the Hilbert-Schmidt norm That was quick :) Thanks! |
|
Dec 10 |
comment |
A matrix inequality involving the Hilbert-Schmidt norm Not naive at all. I tried with the analytic approach but it did not seem to clarify the problem, indeed $Q(v)$ is a fourth order polynomial in $v$. Before plunging in the computations, I was hoping to find some more synthetic approach using matrix inequalities |
|
Dec 10 |
asked | A matrix inequality involving the Hilbert-Schmidt norm |
|
Dec 5 |
awarded | ● Popular Question |
|
Nov 26 |
answered | Does Physics need non-analytic smooth functions? |
