Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Stenger, Isabel"'
We formulate an {\it effective cone conjecture} for klt Calabi--Yau pairs $(X,\Delta)$, pertaining to the structure of the cone of effective divisors $\mathrm{Eff}(X)$ modulo the action of the subgroup of pseudo-automorphisms $\mathrm{PsAut}(X,\Delta
Externí odkaz:
http://arxiv.org/abs/2406.07307
Autor:
Stenger, Isabel, Xie, Zhixin
Let $X$ be the blowup of $\mathbb{P}^3$ at eight very general points. We give a complete description of its nef and effective cones. Moreover, we show that there exists a rational polyhedral fundamental domain for the action of a certain Weyl group o
Externí odkaz:
http://arxiv.org/abs/2303.12005
We study Calabi-Yau manifolds which are complete intersections of hypersurfaces of multidegree $1$ in an $m$-fold product of $n$-dimensional projective spaces. Using the theory of Coxeter groups, we show that the birational automorphism group of such
Externí odkaz:
http://arxiv.org/abs/2207.11150
Autor:
Schreyer, Frank-Olaf, Stenger, Isabel
In this paper we study marked numerical Godeaux surfaces with special bicanonical fibers. Based on our construction method of marked Godeaux surfaces we give a complete characterization for the existence of hyperelliptic bicanonical fibers and torsio
Externí odkaz:
http://arxiv.org/abs/2201.12065
Autor:
Hoff, Michael, Stenger, Isabel
We show that for any smooth Calabi-Yau threefold $X$ of Picard number $2$ with infinite birational automorphism group, the numerical dimension $\kappa_\sigma$ of the extremal rays of the movable cone of $X$ is $\frac{3}{2}$. Furthermore, we provide n
Externí odkaz:
http://arxiv.org/abs/2111.13521
Autor:
Schreyer, Frank-Olaf, Stenger, Isabel
Publikováno v:
In Journal of Pure and Applied Algebra December 2024 228(12)
Autor:
Schreyer, Frank-Olaf, Stenger, Isabel
In this paper we describe a construction method for numerical Godeaux surfaces based on homological algebra. We show the existence of an 8-dimensional locally complete family of simply connected numerical Godeaux surfaces.
Comment: 28 pages. We
Comment: 28 pages. We
Externí odkaz:
http://arxiv.org/abs/2009.05357
Autor:
Stenger, Isabel
The famous structure theorem of Buchsbaum and Eisenbud gives a complete characterization of Gorenstein ideals of codimension 3 and their minimal free resolutions. We generalize the ideas of Buchsbaum and Eisenbud from Gorenstein ideals to Gorenstein
Externí odkaz:
http://arxiv.org/abs/1910.00516
Autor:
Stenger, Isabel
Publikováno v:
In Journal of Algebra 1 January 2022 589:173-187
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