==Convolutions on groups==If "G" is a suitable group endowed with a measure λ, and if "f" and "g" are real or complex valued integrable functions on "G", then we can define their convolution by:formula_43It is not commutative in general.
== Convolutions on groups ==If "G" is a suitable group endowed with a measure λ, and if "f" and "g" are real or complex valued integrable functions on "G", then we can define their convolution by:formula_38In typical cases of interest "G" is a locally compact Hausdorff topological group and λ is a (left-) Haar measure.