中文
相关论文

相关论文: An algorithm for the classification of smooth Fano…

200 篇论文

We classify the d-dimensional simplicial, terminal, and reflexive polytopes with at least 3d-2 vertices. In particular, it turns out that these are all smooth Fano polytopes. This improves on previous results of Casagrande in 2006 and Oebro…

代数几何 · 数学 2015-07-31 Benjamin Assarf , Michael Joswig , Andreas Paffenholz

We obtain 866 isomorphism classes of five-dimensional nonsingular toric Fano varieties using a computer program and the database of four-dimensional reflexive polytopes. The algorithm is based on the existence of facets of Fano polytopes…

代数几何 · 数学 2010-02-14 Maximilian Kreuzer , Benjamin Nill

The classification of toric Fano manifolds with large Picard number corresponds to the classification of smooth Fano polytopes with large number of vertices. A smooth Fano polytope is a polytope that contains the origin in its interior such…

代数几何 · 数学 2015-08-11 Benjamin Assarf , Benjamin Nill

We classify terminal simplicial reflexive d-polytopes with 3d-1 vertices. They turn out to be smooth Fano d-polytopes. When d is even there is 1 such polytope up to isomorphism, while there are 2 when d is uneven.

组合数学 · 数学 2007-05-23 Mikkel Øbro

Let $\mathcal{F}(n)$ be the set of smooth Fano $n$-polytopes up to unimocular equivalence. In this paper, we consider the F-equivalence or I-equivalence classes for $\mathcal{F}(n)$ and introduce F-isolated or I-isolated smooth Fano…

代数几何 · 数学 2015-03-24 Akihiro Higashitani

We give an approximate algorithm of computing holonomic systems of linear differential equations for definite integrals with parameters. We show that this algorithm gives a correct answer in finite steps, but we have no general stopping…

符号计算 · 计算机科学 2010-12-27 Hiromasa Nakayama , Nobuki Takayama

After giving a short introduction on smooth lattice polytopes, I will present a proof for the finiteness of smooth lattice polytopes with few lattice points. The argument is then turned into an algorithm for the classification of smooth…

组合数学 · 数学 2010-01-05 Benjamin Lorenz

In this paper, we classify smooth toric Fano 5-folds of index 2. There exist exactly 10 smooth toric Fano 5-folds of index 2 up to isomorphisms.

代数几何 · 数学 2007-05-23 Hiroshi Sato

The Fine interior $\Delta^{\text{FI}}$ of a $d$-dimensional lattice polytope $\Delta$ is a rational subpolytope of $\Delta$ which is important for constructing minimal birational models of non-degenerate hypersurfaces defined by Laurent…

代数几何 · 数学 2022-10-28 Victor Batyrev , Alexander Kasprzyk , Karin Schaller

We classify smooth Fano threefolds with infinite automorphism groups.

代数几何 · 数学 2021-06-11 Ivan Cheltsov , Victor Przyjalkowski , Constantin Shramov

Based on the former parts, we classify smooth Fano threefolds of positive characteristic.

代数几何 · 数学 2025-12-04 Hiromu Tanaka

We prove an upper bound of the form $2^{O(d^2 \mathrm{polylog}\,d)}$ on the number of affine (resp. linear) equivalence classes of, by increasing order of generality, 2-level d-polytopes, d-cones and d-configurations. This in particular…

组合数学 · 数学 2018-06-18 Samuel Fiorini , Marco Macchia , Kanstantsin Pashkovich

In this paper we explain the complete biregular classification of all 4-dimensional smooth toric Fano varieties. The main result states that there exist exactly 123 different types of toric Fano 4-folds up to isomorphism.

代数几何 · 数学 2007-05-23 Victor V. Batyrev

Fano varieties are 'atomic pieces' of algebraic varieties, the shapes that can be defined by polynomial equations. We describe the role of computation and database methods in the construction and classification of Fano varieties, with an…

代数几何 · 数学 2022-11-21 Gavin Brown , Tom Coates , Alessio Corti , Tom Ducat , Liana Heuberger , Alexander Kasprzyk

We completely classify toric weakened Fano 3-folds, that is, smooth toric weak Fano 3-folds which are not Fano but are deformed to smooth Fano 3-folds. There exist exactly 15 toric weakened Fano 3-folds up to isomorphisms.

代数几何 · 数学 2007-05-23 Hiroshi Sato

We give a classification of smooth Fano fourfolds such that the base scheme of the anticanonical system is a smooth surface. As a consequence we show that there are exactly 22 deformation families of such manifolds and they are all obtained…

代数几何 · 数学 2025-10-27 Andreas Höring , Saverio Andrea Secci

We describe a provably complete algorithm for the generation of a tight, possibly exact superset of all combinatorially distinct simple n-facet polytopes in R^d, along with their graphs, f-vectors, and face lattices. The technique applies…

组合数学 · 数学 2009-08-13 Sandeep Koranne , Anand Kulkarni

We prove that, for fixed n there exist only finitely many embeddings of Q-factorial toric varieties X into P^n that are induced by a complete linear system. The proof is based on a combinatorial result that for fixed nonnegative integers d…

In this paper, we consider terminal reflexive polytopes arising from finite directed graphs and study the problem of deciding which directed graphs yield smooth Fano polytopes. We show that any centrally symmetric or pseudo-symmetric smooth…

组合数学 · 数学 2015-11-04 Akihiro Higashitani

It is known that there are only finitely many mutation-equivalence classes with a given singularity content, and each of these equivalence classes contains only finitely many minimal polygons. We describe an efficient algorithm to classify…

代数几何 · 数学 2017-03-16 Daniel Cavey , Edwin Kutas
‹ 上一页 1 2 3 10 下一页 ›