The convolution of two Complex-valued functions on a Group is defined as

where the Support (set which is not zero) of each function is finite.

**References**

Weinstein, A. ``Groupoids: Unifying Internal and External Symmetry.'' *Not. Amer. Math. Soc.* **43**, 744-752, 1996.

© 1996-9

1999-05-25