help. I can't find help on LaPlace transform



Sin by itself is not a valid expression. I think you want
laplace(sin(x),x,4).

Laplace() is described in the Differentiation section of the online manual.


Viktor


-----Original Message-----
From: maxima-admin@math.utexas.edu [mailto:maxima-admin at math] On
Behalf Of Doug Stewart
Sent: Friday, May 06, 2005 10:51 PM
Cc: maxima@math.utexas.edu
Subject: help. I can't find help on LaPlace transform

Where is the help for laplace transforms?
I tried

(%i9) LaPlace(sin,x,4);
                                    SIN
(%o9)                          ---
                                     4

And this is not what I was expecting!




Also I tried:

integrate(sin(5*x)*exp(-s*x),x,0,inf);

Ans it asked me if s was

(%i25) integrate(sin(5*x)*exp(-s*x),x,0,inf);
Is  s  positive, negative, or zero?

I am using winXP and when I try to respond to the question Maxima 
doesn't seem to get the response.
It just keeps waiting for my answer.
I tried:

(%i25) integrate(sin(5*x)*exp(-s*x),x,0,inf);
Is  s  positive, negative, or zero? positive;


I tried
(%i25) integrate(sin(5*x)*exp(-s*x),x,0,inf);
Is  s  positive, negative, or zero?
positive;

But no results.
What am I doing wrong?
Doug Stewart


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