meta user
network profile
| bio | website | |
|---|---|---|
| location | Beijing, China | |
| age | 21 | |
| visits | member for | 1 year, 2 months |
| seen | Nov 30 '12 at 8:02 | |
| stats | profile views | 18 |
An undergraduate at Tsinghua University in China
|
Jun 10 |
awarded | Teacher |
|
Jun 10 |
comment |
Proving unique weak solution. For the second question,you can use the representation theorem in Hilbert Space.For more details,you can read Page 118 in the PDE by Fritz John. |
|
Jun 10 |
answered | Proving unique weak solution. |
|
Jun 10 |
awarded | Editor |
|
Jun 10 |
revised |
The distinction between infinitely differentiable function and real analytic function added 15 characters in body |
|
Jun 10 |
asked | The distinction between infinitely differentiable function and real analytic function |
|
Jun 4 |
accepted | A problem concerning Series |
|
Jun 4 |
comment |
A problem concerning Series Oh!That's great!I never think in this way!Thank you! |
|
Jun 4 |
asked | A problem concerning Series |
|
May 18 |
accepted | A problem concerning the Measurable function |
|
May 18 |
comment |
A problem concerning the Measurable function Thank you,leo!I just forget that if $f$ and $g$ are measurable in $\mathbb{R^d}$, then $fg$ is measurable in $\mathbb{R^d}$. |
|
May 18 |
comment |
A problem concerning the Measurable function @Siminore.Thank you for your help.But I still cannot make it clear.I have read Page 1 of this document.I have known that $F(x,y)=f(y-x)$ is measurable on $\mathbb{R^2}$.However,why $f(y-x)g(x)$ is measurable? |
|
May 18 |
comment |
A problem concerning the Measurable function I am sorry that I do not make it clear.$f$ and $g$ are in the $\mathcal{L^1}(\mathbb{R})$,i.e. $f$ and $g$ are Lebesgue measurable functions and absolutely integrable functions in $\mathbb{R}$. |
|
May 18 |
asked | A problem concerning the Measurable function |
|
May 13 |
awarded | Scholar |
|
May 13 |
accepted | A problem about the cover of the interval |
|
May 13 |
comment |
A problem about the cover of the interval Ok!I got it!I have a wrong hypothesis here.Thank you all! |
|
May 12 |
awarded | Student |
|
May 12 |
asked | A problem about the cover of the interval |
|
Apr 28 |
awarded | Tumbleweed |
