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3h
comment Inverse Laplace operator $\Delta^{-1}$ and Sobolev spaces
What do you mean with $\ast$? Simple product? Is this result also valid for $H^{-1}$?
6h
comment Semplify $\det\left(D+M+A\right)$.
No, as I said in the post, it was just my curiosity. I was adding some matrices before calculate the determinant, and I realized that they were matrices rewritable in this form. So I wondered if there was a simplification for the determinant of their sum.
6h
asked Inverse Laplace operator $\Delta^{-1}$ in $H^1_0, \ H^{−1}$.
7h
asked Semplify $\det\left(D+M+A\right)$.
14h
accepted Role of known term in Routh - Hurwitz criterion, for $x^8 - 36·x^7 + 546·x^6 - 4536·x^5 + 22449·x^4 - 67284·x^3 + 118124·x^2 - 109584·x + 40321=0$.
15h
asked Role of known term in Routh - Hurwitz criterion, for $x^8 - 36·x^7 + 546·x^6 - 4536·x^5 + 22449·x^4 - 67284·x^3 + 118124·x^2 - 109584·x + 40321=0$.
16h
reviewed Reject Balls and bins counting problem with some indistinguishable balls and cap on number of indistinguishable balls per bucket
1d
accepted Operator equation $Au = f$ for $-\Delta u(x)=f(x)$
1d
asked Operator equation $Au = f$ for $-\Delta u(x)=f(x)$
1d
asked An example of frame operator.
1d
reviewed Approve Wronskian of two differential equation solutions
2d
reviewed Reject If X,Y and Z are independent, are X and YZ independent?
Jul
2
reviewed Approve Maximum and minimum average question
Jul
2
reviewed Reject Can any one help me solve this integral ???
Jul
1
comment Evaluate $\int_0^1 \frac{P_3(t)}{\sqrt{1-k^2 P_3^2(t)}}dt$
I do not know what you have in mind to do. If you want, you can write an answer, so I understand what you mean. :)
Jun
30
reviewed Reject Showing that infinite product of random variables goes to zero: $\prod^\infty X_i \rightarrow 0 \text{ a.s.}$
Jun
30
comment Evaluate $\int_0^1 \frac{P_3(t)}{\sqrt{1-k^2 P_3^2(t)}}dt$
@AlexM. No. At first I thought that, given the symmetry of the integral, this could be elliptical. I was wrong. However there is also another question in my post, that is, to give any approximations for this integral: $\int_0^1 \frac{P_3(t)}{\sqrt{1-k^2 P_3^2(t)}}dt$.
Jun
30
comment Evaluate $\int_0^1 \frac{P_3(t)}{\sqrt{1-k^2 P_3^2(t)}}dt$
@AlexM. Not only this. I am especially asking if anyone knows an approximation of an integral of this type or related to it.
Jun
30
answered Integral involving a trig. term
Jun
30
revised Reference for the statement “bilinear form $a$ is symmetric if and only if the operator $S$ is self-adjoint”
edited body