meta user
network profile
| bio | website | twitter.com/#!/ziyuang |
|---|---|---|
| location | ||
| age | ||
| visits | member for | 2 years |
| seen | yesterday | |
| stats | profile views | 124 |
|
Jun 13 |
revised |
Can anyone recommend some books on PDE in $L^p$ space for me? edited tags |
|
Jun 13 |
comment |
Can anyone recommend some books on PDE in $L^p$ space for me? $L^p$ theory of PDE typically cope with the properties of the solution in $L^p$ space (and Sobolev, Hölder...) of some PDEs, rather than what we learn at undergraduate courses, where solutions are smooth. |
|
Jun 13 |
revised |
How to calculate the degrees of freedom of an $r$-ranked matrix with the size being $n\times n$? further explanation of "degrees of freedom"; deleted 4 characters in body |
|
Jun 13 |
comment |
How to calculate the degrees of freedom of an $r$-ranked matrix with the size being $n\times n$? @Arturo Magidin, sorry for the ambiguity. Here I treat matrices as vectors lying in $\mathbb{R}^{n^2}$. And matrices with rank $r (r<n)$ are supposed to lie within a manifold of lower dimension. For example, the singular matrices lie within a $(n^2-1)$-dimensional manifold, because they satisfy $\det(M)=0$, the sole constraint. Alternatively, we can call the dimension of that lower-dimensional manifold as "Degree of freedom". |
|
Jun 13 |
asked | How to calculate the degrees of freedom of an $r$-ranked matrix with the size being $n\times n$? |
|
Jun 13 |
comment |
Can anyone recommend some books on PDE in $L^p$ space for me? Ah, 18-155 and 18-156 on OCW@MIT seem good supplements. |
|
Jun 13 |
asked | Can anyone recommend some books on PDE in $L^p$ space for me? |
|
Jun 9 |
revised |
Two vague steps in the proof of Harnack inequality snapshot inserted |
|
Jun 7 |
comment |
Applications of algebra to algorithms It proves that there aren't such algorithms so...it can serve as an example for the other side/direction. |
|
Jun 7 |
revised |
Applications of algebra to algorithms added 62 characters in body |
|
Jun 7 |
answered | Applications of algebra to algorithms |
|
Jun 7 |
answered | Applications of algebra to algorithms |
|
Jun 6 |
revised |
Get polar equation from cartesian equation "Texize" the formulas |
|
Jun 6 |
suggested | suggested edit on Get polar equation from cartesian equation |
|
Jun 6 |
answered | How can I solve this infinite sum? |
|
Jun 6 |
answered | Proof of Permutations |
|
Jun 4 |
awarded | Critic |
|
Jun 3 |
revised |
Mathematica: How to convert scales to frequencies? added 20 characters in body |
|
Jun 3 |
comment |
Is there a number system with matrix base? I just did some googling: compalg.elte.hu/projects/binsys |
|
Jun 3 |
revised |
Matrix equation question added 26 characters in body |
