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Dear friends,
I have here a simple example, but in MC15 I do not get the same results as in the example.
WHo can help?
Thanks
Walter
I have found my misunderstanding of Laplace transform. Only f(t) must be tranformed, see MC15 sheet.
Dear Valery,
I want to solve a ODE by LaplaceTransformation. I have f(t) and in MMA the results is as follows. (see pic)
ANd in MC 15 I do get a other form. Is that the same? Thanks for help
Walter
Here I could solve the ODE with laplace in MMA successfully. BUT in MC it does n ot work .
WHY? Any advices are welcome.
Thanks
Walter
Dear Fred,
thanks a lot for your fast response.
When I transform the f(t) with MMA I got this result. Are you sure that you did not miss the Theta(tau)?
Thanks for your reply.
There is (was) a lot of errors at Laplace Trans in Mathcad 14/15 (with MuPad not Maple Symbolic Engine).
Yes I think that is still a bug. See inv transform of f(t) in pic.
Walter Schrabmair wrote:
Yes I think that is still a bug. See inv transform of f(t) in pic.
This is one reason why our (with V.Korobov) book has a titel "Chemical Kinetics with Mathcad and... Maple"
thanks Valery, I tried it with Maple v15 but have problems in translate the MMA 8.0 sheet into Maple.
I have asked a help question in http://www.mapleprimes.com/questions/130265WhoCanHelpMeInTransformASimple?sq=130265
Maybe there is a helping hand for that problem on the Maple forum.
thansk
walter
I'm flailing a bit, and my version 14.0 is having serious problems with the symbolic solver.
See if this makes sense:
Looks good but got still an error that the X1 or X2 fn is not defined  even that in MC 15 the red invlap lines signals that is just to big to display but should be able to store in fn.
Please take a look.
Thanks a lot
THis Problem with Laplace substitution can also not be solve in MathCAD 15 M 020. WHat a shame!
Thanks Werner, yes I agree to you. Let`s wait until PRIME 6.0, maybe they will correct this bug.
Prime 6 already!? Thats what I call optimism and positive thinking ;)
But then, I won't bet on it.