4 citations · 20 across the 25 of their papers we have counts for
26 papers
Non-smoothable curve singularities
Jan Stevens
For curves singularities the dimension of smoothing components in the deformation space is an invariant of the singularity, but in general the deformation space has components of d…
On unsolvable equations of prime degree
Juliusz Brzeziński, Jan Stevens
Kronecker observed that either all roots or only one root of a solvable irreducible equation of odd prime degree with integer coefficients are real. This gives a possibility to con…
Early proofs of Hilbert's Nullstellensatz
Jan Stevens
By Rabinowitsch' trick Hilbert's Nullstellensatz follows from the weak Nullstellensatz (Rabinowitsch 1929). The weak version can be shown with elimination theory. Hilbert's origina…
The Dimension of the Moduli Space of Pointed Algebraic Curves of Low Genus
Jan Stevens
We explicitly compute the moduli space pointed algebraic curves with a given numerical semigroup as Weierstrass semigroup for many cases of genus at most seven and determine the di…
On nonnegatively graded Weierstrass points
André Contiero, Aislan Leal Fontes, Jan Stevens +1
We provide a new lower bound for the dimension of the moduli space of smooth pointed curves with prescribed Weierstrass semigroup at the marked point, derived from the Deligne-Greu…
The space of twisted cubics
Katharina Heinrich, Roy Skjelnes, Jan Stevens
We consider the Cohen-Macaulay compactification of the space of twisted cubics in projective n-space. This compactification is the fine moduli scheme representing the functor of CM…