A topological ring is said to
have property (Y ) if, and only if, 2A = A; A has a proper continuous involution (with
symmetric elements S) such that whenever the net {2xα} tends to zero, so also does
{xα}; A3 is dense in A; and the left annihilator of a closed Jordan ideal, U, of S is
zero if, and only if, U is S.
One shows that for such rings and for annihilator rings with the first two
properties above that every closed Jordan ideal of S is the intersection of S
with a closed two-sided ideal. Also shown is the fact that S ∘ S is dense in
S.
A study is made of relations between the socle and Jordan ideals of S for
topological rings. Finally, a new proof of Herstein’s result for S in simple associative
rings is given.
|