error in laplace

06262014, 05:30 AM
Post: #1




error in laplace
hi,
something is wrong with the laplace function in the CAS. One of the examples in the Help menu is laplace(sin(x)^2,x,s) and my Prime returns Error: Bad argument Value. Other examples are weirder. For instance, laplace(sin(x)) returns 1/(1+x^2) but before that, a warning shows reading: Unable to check if antiderivative e^... ( some strange charecters). 

06272014, 09:00 PM
Post: #2




RE: error in laplace
Alberto,
Something must be messed up with your settings. laplace(sin(x)^2,x,s) returns 2/(s^3+4*s) for me; certainly no error message. Regarding the warnings, just ignore and press enter   I believe that Bernard Parisse has indicated he would remove warnings which can be safely ignored anyway (at least in Xcas   whether that will make it into the Prime is another matter). 

06272014, 10:00 PM
Post: #3




RE: error in laplace
(06272014 09:00 PM)Helge Gabert Wrote: Alberto, Well, we have the same settings I believe, but I still get that error. 

06272014, 10:05 PM
Post: #4




RE: error in laplace
My bad. It looks like I had an "s" variable in CAS. After removing it, I get the answer, after going through a warning.


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