[كتاب][B] Quaternion algebras

J Voight - 2021‏ - library.oapen.org
This open access textbook presents a comprehensive treatment of the arithmetic theory of
quaternion algebras and orders, a subject with applications in diverse areas of mathematics …

Orbifolds as stacks?

E Lerman - L'Enseignement mathématique, 2010‏ - ems.press
The first goal of this survey paper is to argue that if orbifolds are groupoids, then the
collection of orbifolds and their maps has to be thought of as a 2-category. Compare this with …

[كتاب][B] Sasakian geometry

C Boyer, K Galicki - 2007‏ - academic.oup.com
Sasakian manifolds were first introduced in 1962. This book's main focus is on the intricate
relationship between Sasakian and Kähler geometries, especially when the Kähler structure …

[كتاب][B] Poisson structures and their normal forms

JP Dufour, NT Zung - 2006‏ - books.google.com
Poisson manifolds play a fundamental role in Hamiltonian dynamics, where they serve as
phase spaces. They also arise naturally in other mathematical problems, and form a bridge …

The orbifold Chow ring of toric Deligne-Mumford stacks

L Borisov, L Chen, G Smith - Journal of the American Mathematical Society, 2005‏ - ams.org
Generalizing toric varieties, we introduce toric Deligne-Mumford stacks. The main result in
this paper is an explicit calculation of the orbifold Chow ring of a toric Deligne-Mumford …

An integral structure in quantum cohomology and mirror symmetry for toric orbifolds

H Iritani - Advances in Mathematics, 2009‏ - Elsevier
We introduce an integral structure in orbifold quantum cohomology associated to the K-
group and the Γˆ-class. In the case of compact toric orbifolds, we show that this integral …

Differentiable stacks and gerbes

K Behrend, P Xu - 2011‏ - projecteuclid.org
We introduce differentiable stacks and explain the relationship with Lie groupoids. Then we
study S^1-bundles and S^1-gerbes over differentiable stacks. In particular, we establish the …

[كتاب][B] Basic noncommutative geometry

M Khalkhali - 2013‏ - ems.press
One of the major advances of science in the 20th century was the discovery of a
mathematical formulation of quantum mechanics by Heisenberg in 1925 [103]. 1 From a …

Lectures on integrability of Lie brackets

M Crainic, RL Fernandes - Geom. Topol. Monogr, 2011‏ - msp.org
The subject of these lecture notes is the problem of integrating infinitesimal geometric
structures to global geometric structures. We follow the categorical approach to differential …

The Euler characteristic of a category

T Leinster - Documenta Mathematica, 2008‏ - ems.press
The Euler characteristic of a finite category is defined and shown to be compatible with Euler
characteristics of other types of object, including orbifolds. A formula is proved for the …