Before revision: On the unit circle In general, elements of L2 on the unit circle are given by whereas elements of H2 are given by The projection from L2 to H2 (by setting an = 0 when n < 0) is orthogonal.
After revision: On the unit circle In general, elements of L2222 on the unit circle are given by whereas elements of H1hshuydrxrdtfygvbhjunkml2 are given by The projection from L2 to H2 (by setting an = 0 when n < 0) is orthogonal.