MSC results for "16R."

**16R**(1991-now) Rings with polynomial identity

**16R10**(1991-now) $T$-ideals, identities, varieties of rings and algebras

**16R20**(1991-now) Semiprime p.i. rings, rings embeddable in matrices over commutative rings

**16R30**(1991-now) Trace rings and invariant theory

**16R40**(1991-now) Identities other than those of matrices over commutative rings

**16R50**(1991-now) Other kinds of identities (generalized polynomial, rational, involution)

**16R60**(2010-now) Functional identities

**16R99**(1991-now) None of the above, but in this section