Mathematics Subject Classification 1991

13Axx General commutative ring theory ( 0 Dok. )

• 13A02 Graded rings, See also {16W50} ( 0 Dok. )
• 13A05 Divisibility ( 0 Dok. )
• 13A10 Radical theory ( 0 Dok. )
• 13A15 Ideals; multiplicative ideal theory ( 0 Dok. )
• 13A18 Valuations and their generalizations ( 0 Dok. )
• 13A20 Brauer groups, See also {12Gxx, 16H05} ( 0 Dok. )
• 13A30 Associated graded rings of ideals (Rees ring, form ring) and related topics ( 0 Dok. )
• 13A35 Characteristic $p$ methods (Frobenius endomorphism) and reduction to characteristic $p$, See also {13Mxx} ( 0 Dok. )
• 13A50 Invariant theory, See also {14D25} ( 0 Dok. )
• 13A99 None of the above but in this section ( 0 Dok. )