In this paper, we introduce Gram matrices for
the signed partition algebras, the algebra of Z2-relations and the par-
tition algebras. The nondegeneracy and symmetic nature of these
Gram matrices are establised. ...
In the paper [6], we introduced Gram matrices
for the signed partition algebras, the algebra of Z2-relations and
the partition algebras. (s1, s2, r1, r2, p1, p2)-Stirling numbers of the
second kind are also introduced ...