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PhD student of Mathematics


1d
comment How do I apply this maximum principle?
$\Gamma$ is the boundary of box $D$ without the top @par, $Lu=f$ is the differential equation satisfied by $u$.
Jul
4
comment How to determine the eigenvectors for this matrix
How are you getting v? Row operations give $\left( \begin{array}{ccc} 1 & -\frac{\beta}{\alpha+\lambda_i}\\ 0 & \frac{\alpha-K\lambda_i}{\beta} \end{array} \right)$ from which $v_2$ is zero
Jun
14
comment Distribution of minimum of independent normal variables
No that was not my question. I realised that I can use a different way and avoid it
May
30
comment How to establish a lower bound on this difference operator?
@LutzL, see the edit to see how far I got.
Apr
22
comment Hint in Proving that $n^2\le n!$
justify the "?" in your answer
Apr
22
comment Hint in Proving that $n^2\le n!$
how is this correct, you have used something that you are trying to prove
Apr
21
comment How to simplify the expression $(E \cup F)\cap(E \cup F^{c})$?
yes it's an intersection
Apr
16
comment Integrating the Gaussian kernel with absolute value
Thanks I have seen the steps
Apr
16
comment Integrating the Gaussian kernel with absolute value
I appreciate your help but I could you add more steps to in the integration process and how you use the erf.
Apr
15
comment Integrating the Gaussian kernel with absolute value
I understand how to split the integral, but if is make $z=-y$ in the second integral I get $\int_0^{\infty}ze^{-(\xi+z)^2/4t}$ which is different to the first integral
Apr
15
comment Integrating the Gaussian kernel with absolute value
I cannot see how the second integral is the same as the first
Apr
12
comment Establishing a certain bound
@cheapeffectivedietpills, I have added the reference
Apr
11
comment Establishing a certain bound
i think they are different
Apr
9
comment How to find the particular solution of a second order difference equation
Thank you, this is very clear.
Apr
9
comment How to find the particular solution of a second order difference equation
true, it's a mistake. Thanks.
Apr
8
comment How to find the particular solution of a second order difference equation
provide more details
Jan
27
comment How to divide solutions of system of ODE
yes my integral looks like the one you have there, but can that integral be found explicitly?
Jan
20
comment Solution of a nonlinear ODE
see the edit it's a constant.
Nov
27
comment To verify that a sequence of functions is increasing
I understand what you saying, $f_n$ is just $e^{-x}$ when $x\leq n$, but I how should I put it in writing. Please elaborate.
Nov
22
comment To verify that a sequence of functions is increasing
So how is it done