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Discrete Integrable Systems: QRT Maps and Elliptic Surfaces

TLDR
The QRT Map as discussed by the authors is the pencil of biquadratic curves in the projective plane of the QRT surface and is used to measure the distance between two points.
Abstract
The QRT Map.- The Pencil of Biquadratic Curves in .- The QRT surface.- Cubic Curves in the Projective Plane.- The Action of the QRT Map on Homology.- Elliptic Surfaces.- Automorphisms of Elliptic Surfaces.- Elliptic Fibrations with a Real Structure.- Rational elliptic surfaces.- Symmetric QRT Maps.- Examples from the Literature.- Appendices.

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Difference Equations by Differential Equation Methods

TL;DR: In this paper, the authors give an introduction to elementary solution methods for differential equations and give readers a clear explanation of exact techniques for ordinary and partial difference equations, which is suitable for anyone who is familiar with standard differential equation methods.
Journal ArticleDOI

Geometric properties of Kahan's method

TL;DR: In this article, it was shown that Kahan's discretization of quadratic vector fields is equivalent to a Runge-Kutta method, which produces large classes of integrable rational mappings in two and three dimensions.
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Toric elliptic fibrations and F-theory compactifications

TL;DR: In this article, a fiber-divisor graph is introduced as a way to visualize the embedding of the Kodaira fibers in the ambient toric fiber, in particular in the case of non-split discriminant components.
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Toric Elliptic Fibrations and F-Theory Compactifications

TL;DR: In this article, the exact relation between the lattice polytope and the elliptic fibration structure is described and the fiber-divisor graph is introduced as a way to visualize the embedding of the Kodaira fibers in the ambient toric fiber.
Journal ArticleDOI

Integrability properties of Kahan's method

TL;DR: In this article, the authors present several integrable quadratic vector fields for which Kahan's discretization method preserves integrability, including generalized Suslov and Ishii systems, Nambu systems, Riccati systems, and the first Painleve equation.