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A brief introduction to exterior differential systems for graduate students familiar with manifolds and differential forms. For complete files, see https://github.com/Ben-McKay/introduction-to-exterior-differential-systems

Differential Geometry · Mathematics 2020-09-17 Benjamin McKay

This paper presents a brief but comprehensive introduction to certain mathematical techniques in General Relativity. Familiar mathematical procedures are investigated taking into account the complications of introducing a non trivial…

Mathematical Physics · Physics 2008-11-06 Andrew DeBenedictis

Geometric mechanics is usually studied in applied mathematics and most introductory texts are hence aimed at a mathematically minded audience. The present note tries to provide the intuition of geometric mechanics and to show the relevance…

Mathematical Physics · Physics 2012-06-18 Christian Lessig

Some examples and basic properties of ultrametric spaces are briefly discussed.

Metric Geometry · Mathematics 2007-11-06 Stephen Semmes

With respect to the Dolbeault complex over the flat manifold $\C^n$, an explicit description of the inverse correspondence of the twistor correspondence is given.

dg-ga · Mathematics 2016-08-31 Yoshinari Inoue

In this paper we review some results on the Riemannian and almost Hermitian geometry of twistor spaces of oriented Riemannian $4$-manifolds with emphasis on their curvature properties.

Differential Geometry · Mathematics 2021-02-09 Johann Davidov , Oleg Mushkarov

An overview is given of the application of twistor geometric ideas to supersymmetry with particular emphasis on the construction of superspaces associated with four-dimensional spacetime. Talk given at Leuven conference, July 1995.

High Energy Physics - Theory · Physics 2007-05-23 P. S. Howe

On base of differential biquaternions algebra and generalized functions theory the biquaternionic wave equation is considered under vector representation of its structural coefficient. Its generalized solutions are constructed, which…

Mathematical Physics · Physics 2014-06-23 L. A Alexeyeva

In this paper, we construct tools from the holomorphic twistor spaces that we introduced in \cite{Gindi1} to derive results about the complex geometries of their base manifolds. In particular, we develop a new approach to studying…

Differential Geometry · Mathematics 2018-11-22 Steven Gindi

This is an elementary geometrical proof of Birkhoff theorem. It is hardly important, but the pictures behind are quite nice.

General Relativity and Quantum Cosmology · Physics 2007-05-23 Pavol Severa

The book covers basics of noncommutative geometry and its applications in topology, algebraic geometry and number theory. A brief survey of main parts of noncommutative geometry with historical remarks, bibliography and a list of exercises…

Operator Algebras · Mathematics 2017-11-15 Igor Nikolaev

This is a study of the construction of particular regular sub-n-gons T in regular n-gons P using a special system of chords of P. In particular, some of these sub-n-gons have areas which are integer divisors of the area of the given n-gon…

History and Overview · Mathematics 2026-03-03 James M Parks

We construct integral forms for the universal enveloping algebras of certain twisted multiloop algebras and explicit integral bases for these integral forms.

Representation Theory · Mathematics 2025-08-26 Angelo Bianchi , Samuel Chamberlin

This article is an expository account of the theory of twisted commutative algebras, which simply put, can be thought of as a theory for handling commutative algebras with large groups of linear symmetries. Examples include the coordinate…

Commutative Algebra · Mathematics 2012-09-25 Steven V Sam , Andrew Snowden

Some basic geometric properties of doubly twisted product immersions are established.

Differential Geometry · Mathematics 2020-11-24 Abdoul Salam Diallo , Fortuné Massamba

This is an expository article for Elsevier's Encyclopedia of Mathematical Physics on the subject in the title. Comments/corrections welcome.

Exactly Solvable and Integrable Systems · Physics 2010-04-19 A. Doliwa , P. M. Santini

The purpose of this paper is to give, on one hand, a mathematical exposition of the main topological and geometrical properties of geometric transitions, on the other hand, a quick outline of their principal applications, both in…

Algebraic Geometry · Mathematics 2015-06-26 Michele Rossi

In this paper we give a brief overview of the geometry of involute gears, from a mathematical more than an engineering perspective. We also list some of the many variant geared mechanisms and discuss some of our 3D printed mechanisms.

History and Overview · Mathematics 2023-01-02 Elisabetta A. Matsumoto , Henry Segerman

These notes accompany an introductory lecture course on the twistor approach to supersymmetric gauge theories aimed at early-stage PhD students. It was held by the author at the University of Cambridge during the Michaelmas term in 2009.…

High Energy Physics - Theory · Physics 2014-11-20 Martin Wolf

These are some informal notes concerning topological vector spaces, with a brief overview of background material and basic notions, and emphasis on examples related to classical analysis.

Classical Analysis and ODEs · Mathematics 2007-05-23 Stephen Semmes