Bezout ring elementary divisor ring 4 13F99 3 neat ring 3 Hermite ring 2 clean ring 2 neat range one 2 ring with elementary reduction of matrices 2 stable range one 2 1 06F20 1 13F15 1 19B10 1 clear ring 1 duo ring 1 finite stable range 1 minimal prime spectrum 1 pseudo-irreducible elemen 1 regular ring 1 semiexchange ring 1 semihereditary ring 1 stable range 1 stable range 1 1 stable range two 1