1.Previous
3.Next

Commutative rings have a product operation.

Residue classes of integers

Residue classes in the rings can be added:

:

and multiplied:

:

Convolution

thumbTwo functions from the reals to itself can be multiplied in another way, called the convolution.

If
:

then the integral

:

is well defined and is called the convolution.

1.Previous
3.Next