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1h
comment Solve wave equation using DSolve?
@kattern As to the The actual situation: is a solution involving unevaluated InverseLaplaceTransform acceptable?
2h
comment Solve PDE with DiracDelta function
In v9.0.1, DSolve returns unevaluated after a warning. For the FourierTransform part: unlike LaplaceTransform, currently FourierTransform isn't handy. To circumvent this, here's a shell for enhancing. But what's really troublesome is: the ODE isn't defined in a infinite domain, so Fourier transform can't be used directly, theoretically one can extend the domain in cycles with e.g. Mod, but personally I never succeeded in the subsequent step: perhaps a artificial periodic function is too hard for FourierTransform, I'm not sure.
1d
revised Solve wave equation using DSolve?
add some explanation.
1d
revised How can I solve this PDE with initial conditions?
added 3 characters in body
1d
revised Solve wave equation using DSolve?
deleted 266 characters in body
1d
revised How can I solve this PDE with initial conditions?
added 243 characters in body
1d
revised Solve wave equation using DSolve?
wrap the procedure into a function
1d
answered Solve wave equation using DSolve?
May
20
comment Save a C compiled function without losing the blessing of C compiler
@OleksandrR. Er…are you sure? I just tested the code in this answer, and funcNew apparently makes use of the DLL even if I restart Mathematica: i.stack.imgur.com/gIqig.png
May
19
accepted Possible Method for MatrixExp
May
19
comment Can Mathematica be used for developing “normal” stand-alone software?
Related: mathematica.stackexchange.com/q/37888/1871
May
19
comment Laplace transform of $\frac{1-\cos (t)}{t}$
Well, are you sure that LaplaceTransform[f[t], t, 2 s] is always equal to LaplaceTransform[f[t/2], t, s]?
May
19
revised Proving (or at least 'being told by Mathematica') that Sqrt[2] is irrational?
The In[2] is miscopied, right?
May
18
asked Possible Method for MatrixExp
May
17
awarded  Popular Question
May
16
comment Analogue for Maple's dchange - change of variables in differential expressions
How about adding one more syntax dChange[expresion, rule, {oldVars}, {newVars}, {functions}] that will internally make use of CoordinateTransform instead of Solve? Then one can do something like Assuming[{r > 0, -Pi < θ < Pi}, dChange[D[f[x, y], x, x] + D[f[x, y], y, y] == 0, "Cartesian" -> "Polar", {x, y}, {r, θ}, f[x, y]]]
May
13
revised Inverse Laplace Transform difficulty
edited tags
May
13
comment Manipulating a damped oscillator plot - plot does not show
possible duplicate of Manipulate not showing anything
May
13
reviewed Reviewed Manipulating a damped oscillator plot - plot does not show
May
13
revised Manipulating a damped oscillator plot - plot does not show
deleted 12 characters in body