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We present an algorithm that covers any given rational ruled surface with two rational parametrizations. In addition, we present an algorithm that transforms any rational surface parametrization into a new rational surface parametrization…

Algebraic Geometry · Mathematics 2014-10-08 J. Rafael Sendra , David Sevilla , Carlos Villarino

The purpose of this article is to give an overview of the construction of moduli spaces of curves from the viewpoint of the log minimal model program for M_g by providing an update of recent developments and discussing future problems. This…

Algebraic Geometry · Mathematics 2011-09-13 Jarod Alper , Donghoon Hyeon

Let X be a minimal complex surface of general type such that its image via the canonical map is a surface; we denote by d the degree of the canonical map. In this expository work, first of all we recall the known possibilities for the…

Algebraic Geometry · Mathematics 2021-03-03 Margarida Mendes Lopes , Rita Pardini

We discuss the minimal model program for projective morphisms of complex analytic spaces. Roughly speaking, we show that the results obtained by Birkar--Cascini--Hacon--M\textsuperscript{c}Kernan hold true for projective morphisms between…

Algebraic Geometry · Mathematics 2022-01-28 Osamu Fujino

We study minimal surfaces X of general type with $K^2_X=6p_g-14$ and $q(X)>0$ such that $K_X$ is ample, the image of the canonical map is a canonically embedded surface of general type and the canonical map is not birational. The main…

alg-geom · Mathematics 2016-08-30 Margarida Mendes Lopes , Rita Pardini

We discuss quantum analogues of minimal surfaces in Euclidean spaces and tori.

Mathematical Physics · Physics 2019-03-28 Joakim Arnlind , Jens Hoppe , Maxim Kontsevich

We prove that the log canonical thresholds of a large class of binomial ideals, such as complete intersection binomial ideals and the defining ideals of space monomial curves, are computable by linear programming.

Algebraic Geometry · Mathematics 2009-04-09 Takafumi Shibuta , Shunsuke Takagi

We give examples of smooth plane quartics over $\mathbb{Q}$ with complex multiplication over $\overline{\mathbb{Q}}$ by a maximal order with primitive CM type. We describe the required algorithms as we go, these involve the reduction of…

First we solve the problem of finding minimal degree families on toric surfaces by reducing it to lattice geometry. Then we describe how to find minimal degree families on, more generally, rational complex projective surfaces.

Algebraic Geometry · Mathematics 2021-03-09 Niels Lubbes , Josef Schicho

We use the Borisov-Keum equations of a fake projective plane and the Borisov-Yeung equations of the Cartwright-Steger surface to show the existence of a regular surface with canonical map of degree 36 and of an irregular surface with…

Algebraic Geometry · Mathematics 2020-01-22 Carlos Rito

We describe a simple algorithm for computing the canonical basis of any finite-dimensional $U_{q}(sp_{2n})$-module.

Quantum Algebra · Mathematics 2007-05-23 Cedric Lecouvey

We provide several applications of the minimal model program to the local and global study of co-rank one foliations on threefolds. Locally, we prove a singular variant of Malgrange's theorem, a classification of terminal foliation…

Algebraic Geometry · Mathematics 2022-11-08 Calum Spicer , Roberto Svaldi

The purpose of this article is to study the deformations of smooth surfaces $X$ of general type whose canonical map is a finite, degree 2 morphism onto a minimal rational surface or onto $\mathbf F_1$, embedded in projective space by a very…

Algebraic Geometry · Mathematics 2010-06-01 Francisco Javier Gallego , Miguel González , Bangere P. Purnaprajna

Invariant minimal surfaces in the real special linear group of degree 2 with canonical Riemannian and Lorentzian metrics are studied. Constant mean curvature surfaces with vertically harmonic Gau{\ss} map are classified.

Differential Geometry · Mathematics 2009-10-19 Jun-ichi Inoguchi

Given a minimal surface equipped with a generically finite map to an Abelian variety, we give an optimal bound on the canonical degree of a rational or an elliptic curve. As a corollary, we obtain the finiteness of rational and elliptic…

Algebraic Geometry · Mathematics 2008-08-12 Steven S. Y. Lu

We prove the abundance theorem for semi log canonical surfaces in positive characteristic.

Algebraic Geometry · Mathematics 2015-10-20 Hiromu Tanaka

On smooth threefolds, the ACC for minimal log discrepancies is equivalent to the boundedness of the log discrepancy of some divisor which computes the minimal log discrepancy. We reduce it to the case when the boundary is the product of a…

Algebraic Geometry · Mathematics 2018-03-08 Masayuki Kawakita

A class of exact membrane solutions is quantized.

High Energy Physics - Theory · Physics 2021-10-27 Jens Hoppe

We prove existence of flips for log canonical foliated pairs of rank one on a Q-factorial projective klt threefold. This, in particular, provides a proof of the existence of a minimal model for a rank one foliation on a threefold for a…

Algebraic Geometry · Mathematics 2025-10-01 Paolo Cascini , Calum Spicer

This note reports some advances in the Equivariant Minimal Model Program (EMMP) for non-isomorphic surjective endomorphisms and their applications in complex and arithmetic dynamics.

Algebraic Geometry · Mathematics 2023-11-29 Sheng Meng , De-Qi Zhang
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