Cohen Macaulay Ring: Mathematics, Commutative Ring, Algebraic Geometry

Ringed Space: Mathematics, Commutative Ring, Open Set, Mathematical Analysis, Scheme, Algebraic Geometry

Spectrum of a Ring: Abstract Algebra, Algebraic Geometry, Commutative Ring

Excellent Ring: Commutative Algebra, Algebraic Geometry, Alexander Grothendieck

Canonical Ring: Mathematics, Algebraic Variety, Complex Manifold, Graded Commutative Ring