Description: Conjugate law for inner product. Postulate (S1) of Beran p. 95. Note
that *x is the complex conjugate cjval of x . In the
literature, the inner product of A and B is usually written
<. A , B >. , but our operation notation co allows to use existing
theorems about operations and also avoids a clash with the definition of
an ordered pair df-op . Physicists use <. B | A >. , called Dirac
bra-ket notation, to represent this operation; see comments in df-bra .
(Contributed by NM, 29-Jul-1999)(New usage is discouraged.)