Tangent cones at Gorenstein singularities
Tate resolution and the structure of the exact local ring
Tate resolutions for commutative graded algebras over a local ring
Tensor products of Clifford modules and linear maximal Cohen-Macaulay modules on quadrics
Tensor products of modules and the rigidity of Tor.
The André-Quillen homology of commutative graded algebras
The Apery algorithm for a plane singularity with two branches.
The Bass-Quillen conjecture in dimension three but characteristic ? 2,3 via a question of A. Suslin.
The Category of Graded Modules.
The Classification of Homogeneous Cohen-Macauly Rings of Finite Representation Type.
The cohomological dimension of the quotient field of the two dimensional complete local domain
The Conductor of one-dimensional Gorenstein Rings in their blowing-up.
The cones associated to some tranversal polymatroids.
The Construction of a Module of Finite Projective Dimension from a Finitely Generated Module of Finite Injective Dimension.
The covariety of perfect numerical semigroups with fixed Frobenius number
Let be a numerical semigroup. We say that is an isolated gap of if A numerical semigroup without isolated gaps is called a perfect numerical semigroup. Denote by the multiplicity of a numerical semigroup . A covariety is a nonempty family of numerical semigroups that fulfills the following conditions: there exists the minimum of the intersection of two elements of is again an element of , and for all such that We prove that the set is a perfect numerical semigroup with...
The degree of rational cuspidal curves.
The effect of quadratic transformations on degree functions.
The effect on associated prime ideals produced by an extension of the base field.
The equality in Buchsbaum rings
The equations of Rees algebras of ideals with linear presentation.