Topological Group Case
For a topological group G, the regular representation in the above sense should be replaced by a suitable space of functions on G, with G acting by translation. See Peter-Weyl theorem for the compact case. If G is a Lie group but not compact nor abelian, this is a difficult matter of harmonic analysis. The locally compact abelian case is part of the Pontryagin duality theory.
Read more about this topic: Regular Representation
Famous quotes containing the words group and/or case:
“Just as a person who is always asserting that he is too good-natured is the very one from whom to expect, on some occasion, the coldest and most unconcerned cruelty, so when any group sees itself as the bearer of civilization this very belief will betray it into behaving barbarously at the first opportunity.”
—Simone Weil (1910–1943)
“Not infrequently, we encounter copies of important human beings; and here, too, as in the case of paintings, most people prefer the copies to the originals.”
—Friedrich Nietzsche (1844–1900)