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visits member for 2 years, 6 months
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Jul
2
awarded  Curious
Feb
15
awarded  Nice Answer
Feb
10
revised How to increase range in Plot without exceeding maximum bounds?
fixed code formatting
Feb
10
suggested suggested edit on How to increase range in Plot without exceeding maximum bounds?
Feb
4
answered Partial differential equation with initial conditions
Feb
3
comment Creating a function as a table of derivations
@Pygmalion g = Function[D[f@@args,#]&/@args//Transpose//Evaluate]
Feb
3
comment Creating a function as a table of derivations
@Pygmalion One can use Function to get a function out of it. I've edited the answer.
Feb
3
revised Creating a function as a table of derivations
added 18 characters in body
Feb
3
answered Creating a function as a table of derivations
Jan
31
comment DSolve cannot solve for certain branches of the solution help pls
One way is to try for numerical values of parameters. If for all constants say, equal to one, Mma couldn't find a solution, there seems to be no sense trying the general case. At least before solving a concrete system.
Jan
29
awarded  Yearling
Dec
27
comment Triple series - evaluation delayed
@robjohn yes. $~$
Dec
25
comment Memory leak issues
Would there be the same problem if Module to be changed to Block?
Dec
24
comment Triple series - evaluation delayed
@Chris'ssis please see the answer below. Numerical checking give near enough values.
Dec
24
answered Triple series - evaluation delayed
Dec
23
comment Triple series - evaluation delayed
The answer is $\pi^2/4$ and it can be guessed via Mathematica. Shortly, evaluating the sums one by one. Now I'm going to sleep, will write tomorrow if somebody wouldn't do it earlier.
Dec
23
comment Incorrect value of infinite sum
@MichaelE2 I tried but strangely it didn't help. Perhaps this example is "pathological" in some sense for the methods used.
Dec
23
answered Incorrect value of infinite sum
Dec
15
comment Inverse Laplace transform not obtained
Using Assumptions can help sometimes. Putting here Assumptions -> l > 0 gives the answer via other special functions. But still it doesn't find inverse. Also one can try some special cases. Here it wouldn't do even for $l=1$, so...
Jul
21
answered integrating a Green's function for a damped harmonic oscillator