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Jan
31
awarded  Yearling
Jan
22
comment $\tt DiracDelta$ behaves incorrectly on multidimensional integral
Seems to work fine in my case. Have you tried restarting the kernel? Maybe there's a definition of F that's altering the result.
Jan
12
comment Black lines at the border of graphics
@YvesKlett, will do that. It happens on two of my machines. I thought it might be a more common problem.
Jan
12
comment Black lines at the border of graphics
An exported. But I get these lines on the screen as well.
Jan
12
comment Black lines at the border of graphics
Yeah, it's weird. I'm getting these lines on two different machines (both with w7 64).
Jan
12
revised Black lines at the border of graphics
Specified the operation system.
Jan
12
asked Black lines at the border of graphics
Jun
6
comment DSolve returns a “wrong” solution
Haha, right:-).
Jun
6
comment DSolve returns a “wrong” solution
What does this equation represent?
Jun
6
comment Improve speed in module with NIntegrate and FindRoots
I can help: use Print to mark different points in your code.
Jun
5
comment How to make a twice-differentiable function that approximates some data?
What about splines? They should work pretty well.
Jun
5
comment Traces of the level surface $z=4x^2+y^2$
How about changing ContourStyle -> {Opacity[0.3]} to ContourStyle -> {Opacity[0.0], Opacity[0.3], Opacity[0.3], Opacity[0.3], Opacity[0.3]} ?
May
25
comment Solve wave equation using DSolve?
Bichoy, kattern, thanks. Seems I was a little bit ignorant.
May
23
revised Recurrence equation
Corrected spelling, corrected formating.
May
23
suggested approved edit on Recurrence equation
May
23
revised Using NDSolve within Manipulate
Added some description.
May
23
comment Solve wave equation using DSolve?
Here's an awkward question: shouldn't the wave equation have a second order derivative of x insted of the fourth? Have you seen this one mathworld.wolfram.com/WaveEquation1-Dimensional.html
May
23
comment Using NDSolve within Manipulate
Glad it works:-).
May
23
comment Using NDSolve within Manipulate
This would require adding addition variables con1, con2,... in the revised1 function just as I've defined the dependence on k1 and others.
May
23
comment Using NDSolve within Manipulate
I've seen the changes of the plot and they are very small. Perhaps one could change the initial conditions for a "better" result (less static one).