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May
6
reviewed Close What particular situation do we have to use RuleDelayed after replacement?
May
6
comment Can we abuse notation and write equations in differential one-form?
I think you really uncovered a blind spot! Now the procedure seems to be evident: Dt[y[x]] evaluates to y'[x] Dt[x] and for any correct DE Dt[x] will be eliminated finally. But these thoughts never came to me!
May
6
comment Why does DSolve not give the expected analytical solution for a system of DAE?
I'm not an expert of DAE, but I think for a linear system it's natural to have only one solution. Can you provide a proof for your belief?
May
5
comment Problem solving a nonlinear partial differential diffusion equation
v10 manages to handle bc[[1]] and bc2[[1]]? I think they're redundant, actually they cause failures of NDSolve in v9.
May
5
comment Why does DSolve not give the expected analytical solution for a system of DAE?
Why you think your by-hand result is correct? Maple's result is the same as Mathematica's: i.stack.imgur.com/OYav3.png
May
4
comment Integral formula for the inverse Laplace transform doesn't work?
@Guesswhoitis. Long time no see, J.M. :) How about giving an answer? I'm not that familiar with Hankel contour.
May
4
comment Computing the coefficients for Gaussian integral
Is it a programming practice or you just need the Gaussian integral weights? If the latter, search GaussianQuadratureWeights in the document.
May
2
reviewed Edit How to get all the symbols `x` for which `f[x]` is defined?
May
2
revised How to get all the symbols `x` for which `f[x]` is defined?
fixed typo
Apr
30
revised Integral formula for the inverse Laplace transform doesn't work?
edited body
Apr
30
accepted Numerical solution of IVP for linear ODE with variable coefficient runs wild soon
Apr
30
revised Difficulty in getting correct Gaussian curve for diffusion of point source
edited tags
Apr
30
revised Integral formula for the inverse Laplace transform doesn't work?
add more examples
Apr
30
revised Bilateral Laplace Transform
the original "output" is wrong
Apr
30
revised Bilateral Laplace Transform
typo fixed
Apr
30
comment My simulation is not never finishing and it is taking so much time?
Well, "need to plot" isn't a reason for using numerical solution. The analytic solution can be used for plotting, too!
Apr
29
answered Bilateral Laplace Transform
Apr
29
comment My simulation is not never finishing and it is taking so much time?
Is numerical solution necessary? Your equations can be solved analytically by DSolve.
Apr
29
comment Difficulty in getting correct Gaussian curve for diffusion of point source
Related: mathematica.stackexchange.com/a/71945/1871
Apr
29
asked Integral formula for the inverse Laplace transform doesn't work?