network profile
| bio | website | |
|---|---|---|
| location | ||
| age | ||
| visits | member for | 1 year, 3 months |
| seen | Apr 2 at 12:54 | |
| stats | profile views | 13 |
|
Apr 2 |
comment |
Determinant of the transpose of elementary matrices no big deal, glad you understand more now too. |
|
Mar 20 |
comment |
Determinant of the transpose of elementary matrices It is not true that $\det{M} = \mathrm{tr}\,M$ for upper or lower triangular matrices. |
|
Feb 22 |
awarded | Yearling |
|
Nov 5 |
revised |
How many integer solutions to a linear combination, with restrictions? deleted 5 characters in body |
|
Nov 5 |
answered | How many integer solutions to a linear combination, with restrictions? |
|
Apr 1 |
answered | Old MIT exam question, how do I solve it? |
|
Mar 14 |
suggested | suggested edit on Newton-Raphson's Method to find $\sqrt{2012}$ |
|
Mar 4 |
awarded | Critic |
|
Mar 4 |
answered | Does $f'(x) = f(\ln(x))$ have an easily expressed solution? |
|
Mar 3 |
revised |
Derivative of $f(x)$ at $0$, when $\lim_{x \to 0} f(x)/|x|=1$ added 5 characters in body |
|
Mar 3 |
answered | Derivative of $f(x)$ at $0$, when $\lim_{x \to 0} f(x)/|x|=1$ |
|
Feb 29 |
revised |
Differential forms and double improper integral added 57 characters in body |
|
Feb 29 |
answered | Differential forms and double improper integral |
|
Feb 29 |
answered | Evaluate $\int_0^1 {\ln(1+x)\over x}\,dx$. |
|
Feb 29 |
comment |
Monge Ampere and Calculus When computing the variational derivative of a functional which depends both on a function's profile, $\phi(x)$ say, and the profile of its derivative, $\phi^\prime(x)$, the Euler-Lagrange equation involves both $\partial L/\partial\phi$ and $\partial L/\partial\phi^\prime(x)$. Read more about the derivation of the Euler-Lagrange equations to see how this comes about. I can recommend a good source or two if the book you're pulling this material from doesn't do it. |
|
Feb 26 |
awarded | Editor |
|
Feb 26 |
revised |
Monge Ampere and Calculus added 452 characters in body |
|
Feb 25 |
comment |
Finding two functions (density) $g,f$ satisfying some conditions I'm assuming the $= M$ at the end only applies to the last equation between the total weight of the densities $f$ and $g$ and not to the above equations, right? |
|
Feb 24 |
answered | Monge Ampere and Calculus |
|
Feb 23 |
comment |
When is a real function orthogonal to its derivative? Yes for both of them. |
