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We make an observation which enables one to deduce the existence of an algebraic stack of log maps for all generalized Deligne--Faltings log structures (in particular simple normal crossings divisor) from the simplest case with log…

Algebraic Geometry · Mathematics 2011-03-29 Dan Abramovich , Qile Chen

These are some notes on the basic properties of algebraic K-theory and G-theory of derived algebraic spaces and stacks, and the theory of fundamental classes in this setting.

Algebraic Geometry · Mathematics 2024-09-24 Adeel A. Khan

We give an explicit description of the Lie algebra of derivations for a class of infinite dimensional algebras which are given by \'etale descent. The algebras under consideration are twisted forms of central algebras over rings, and…

Rings and Algebras · Mathematics 2009-01-30 Arturo Pianzola

Stacks have become a prevalent tool in studying problems with connections to String Theory, hence we see a need to develop a theory of supersymmetric stacks proper. We first define derived stacks on $\mathbb{Z}_2$-bi-graded k-modules…

Algebraic Geometry · Mathematics 2021-02-02 Renaud Gauthier

This is a survey paper on derived symplectic geometry, that will appear as a chapter contribution to the book "New Spaces for Mathematics and Physics", edited by Mathieu Anel and Gabriel Catren. Our goal is to explain how derived stacks can…

Symplectic Geometry · Mathematics 2021-04-08 Damien Calaque

We give a block decomposition of the equivariant derived category arising from a cyclically graded Lie algebra. This generalizes certain aspects of the generalized Springer correspondence to the graded setting.

Representation Theory · Mathematics 2016-10-03 George Lusztig , Zhiwei Yun

In this paper we present an approach to quadratic structures in derived algebraic geometry. We define derived n-shifted quadratic complexes, over derived affine stacks and over general derived stacks, and give several examples of those. We…

Algebraic Geometry · Mathematics 2016-06-16 Gabriele Vezzosi

In this paper, we provide an upgrade of Deligne's geometric class field theory for tamely ramified Galois groups using logarithmic geometry. In particular, we define a framed logarithmic Picard space, and show that a logarithmic…

Algebraic Geometry · Mathematics 2025-08-13 Aaron Slipper

In this paper we will introduce a certain type of morphisms of log schemes (in the sense of Fontaine, Illusie, and Kato) and investigate their moduli. Then by applying this we define a notion of toric algebraic stacks over arbitrary…

Algebraic Geometry · Mathematics 2009-08-29 Isamu Iwanari

We give a characterization of the sets of objects of the derived category of a block of a finite group algebra (or other symmetric algebra) that occur as the set of images of simple modules under an equivalence of derived categories. We…

Representation Theory · Mathematics 2007-05-23 Jeremy Rickard

Basic aspects of differential geometry can be extended to various non-classical settings: Lipschitz manifolds, rectifiable sets, sub-Riemannian manifolds, Banach manifolds, Weiner space, etc. Although the constructions differ, in each of…

Functional Analysis · Mathematics 2007-05-23 Nik Weaver

In this brief note, we investigate graded functions of linear stacks in derived geometry. In particular, we show that under mild assumptions, we can recover a quasi-coherent sheaf on a derived stack from the data of the…

Algebraic Geometry · Mathematics 2021-10-25 Ludovic Monier

Derived geometry provides powerful tools to handle non-transverse intersections and singular moduli problems arising in geometry and theoretical physics. While derived algebraic geometry has been extensively developed, classical field…

Differential Geometry · Mathematics 2025-03-19 David Carchedi

We define the logarithmic tautological rings of the moduli spaces of Deligne-Mumford stable curves (together with a set of additive generators lifting the decorated strata classes of the standard tautological rings). While these algebras…

Algebraic Geometry · Mathematics 2025-05-15 Rahul Pandharipande , Dhruv Ranganathan , Johannes Schmitt , Pim Spelier

We consider recollements of derived categories of dg-algebras induced by self orthogonal compact objects obtaining a generalization of Rickard's Theorem. Specializing to the case of partial tilting modules over a ring, we extend the results…

Rings and Algebras · Mathematics 2013-01-08 Silvana Bazzoni , Alice Pavarin

We introduce and study module structures on both the dgla of multiplicative vector fields and the graded algebra of functions on Lie groupoids. We show that there is an associated structure of a graded Lie-Rinehart algebra on the vector…

Differential Geometry · Mathematics 2024-12-11 Juan Sebastian Herrera-Carmona , Cristian Ortiz , James Waldron

We prove that the dg category of perfect complexes on a smooth, proper Deligne-Mumford stack over a field of characteristic zero is geometric in the sense of Orlov, and in particular smooth and proper. On the level of triangulated…

Algebraic Geometry · Mathematics 2018-08-14 Daniel Bergh , Valery A. Lunts , Olaf M. Schnürer

We explain how to translate several recent results in derived algebraic geometry to derived differential geometry. These concern shifted Poisson structures on NQ-manifolds, Lie groupoids, smooth stacks and derived generalisations, and…

Differential Geometry · Mathematics 2025-10-06 J. P. Pridham

We study \'etale descent of derivations of algebras with values in a module. The algebras under consideration are twisted forms of algebras over rings, and apply to all classes of algebras, notably associative and Lie algebras, such as the…

Rings and Algebras · Mathematics 2013-12-17 Erhard Neher , Arturo Pianzola

We construct a proper moduli space which is a Deligne-Mumford stack parametrising quasimaps relative to a simple normal crossings divisor in any genus using logarithmic geometry. We show this moduli space admits a virtual fundamental class…

Algebraic Geometry · Mathematics 2024-01-15 Qaasim Shafi