22 citations · 23 across the 3 of their papers we have counts for
4 papers
Classifying log del Pezzo surfaces with torus action
Daniel Haettig, Juergen Hausen, Justus Springer
We consider log del Pezzo surfaces coming with a non-trivial torus action. Such a surface is 1/k-log canonical if it allows a resolution of singularities with discrepanies all grea…
Del Pezzo surfaces of Picard number one admitting a torus action
Daniel Haettig, Beatrice Hafner, Juergen Hausen +1
We present efficient classification algorithms for log del Pezzo surfaces with torus action of Picard number one and given Gorenstein index. Explicit results are obtained up to Gor…
On terminal Fano 3-folds with 2-torus action
Benjamin Bechtold, Elaine Huggenberger, Juergen Hausen +1
We classify the terminal Fano threefolds of Picard number one that come with an effective action of a two-torus. Our approach applies also to higher dimensions and generalizes the…
The automorphism group of a variety with torus action of complexity one
Ivan Arzhantsev, Juergen Hausen, Elaine Herppich +1
We consider a normal complete rational variety with a torus action of complexity one. In the main results, we determine the roots of the automorphism group and give an explicit des…