Transforms

12.1 Laplace( f(t), t )

Laplace transform of the functionf(t). f(t) can be any expression, which has a Laplace transform. t is the name of the variable to transform (normally 't' but can be any name).

12.2 iLaplace( F(s), s )

Inverse Laplace transform of the function F(s). F(s) can be any polynomial. It may contain ln( ) and atan( ). s is the name of the variable to transform (normally 's' but can be any name).

12.3 Fourier( f(t), t, 2)

Fourier transform of function f(t) in variable t. Mode can be 1 or 2.

12.4 iFourier( f(w), w, 2)

Inverse Fourier transform of function f(w) in variable w. Mode can be 1 or 2.

The above programs are by Lars Fredericksen. The latest versions may be obtained here under the names: Advanced Laplace 1.4, and Fourier 3.30.

12.5 Fast Fourier Transform

A suite of programs by Lennart Issakson which includes Fast Fourier Transforms, Inverse Fast Fourier Transforms, Discrete Fourier Transforms, Inverse Discrete Fourier Transforms and others.