Homotopical Algebraic Geometry II: Geometric Stacks and Applications

Homotopical Algebraic Geometry II: Geometric Stacks and Applications PDF Author: Bertrand Toën
Publisher: American Mathematical Soc.
ISBN: 0821840991
Category : Mathematics
Languages : en
Pages : 242

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Book Description
This is the second part of a series of papers called "HAG", devoted to developing the foundations of homotopical algebraic geometry. The authors start by defining and studying generalizations of standard notions of linear algebra in an abstract monoidal model category, such as derivations, étale and smooth morphisms, flat and projective modules, etc. They then use their theory of stacks over model categories to define a general notion of geometric stack over a base symmetric monoidal model category $C$, and prove that this notion satisfies the expected properties.

Homotopical Algebraic Geometry II: Geometric Stacks and Applications

Homotopical Algebraic Geometry II: Geometric Stacks and Applications PDF Author: Bertrand Toën
Publisher: American Mathematical Soc.
ISBN: 0821840991
Category : Mathematics
Languages : en
Pages : 242

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Book Description
This is the second part of a series of papers called "HAG", devoted to developing the foundations of homotopical algebraic geometry. The authors start by defining and studying generalizations of standard notions of linear algebra in an abstract monoidal model category, such as derivations, étale and smooth morphisms, flat and projective modules, etc. They then use their theory of stacks over model categories to define a general notion of geometric stack over a base symmetric monoidal model category $C$, and prove that this notion satisfies the expected properties.

Algebraic Topology from a Homotopical Viewpoint

Algebraic Topology from a Homotopical Viewpoint PDF Author: Marcelo Aguilar
Publisher: Springer Science & Business Media
ISBN: 0387224890
Category : Mathematics
Languages : en
Pages : 499

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Book Description
The authors present introductory material in algebraic topology from a novel point of view in using a homotopy-theoretic approach. This carefully written book can be read by any student who knows some topology, providing a useful method to quickly learn this novel homotopy-theoretic point of view of algebraic topology.

Algebraic Geometry

Algebraic Geometry PDF Author: Dan Abramovich
Publisher: American Mathematical Soc.
ISBN: 0821847023
Category : Mathematics
Languages : en
Pages : 506

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Book Description
This volume contains research and expository papers by some of the speakers at the 2005 AMS Summer Institute on Algebraic Geometry. Numerous papers delve into the geometry of various moduli spaces, including those of stable curves, stable maps, coherent sheaves, and abelian varieties.

Higher Categories and Homotopical Algebra

Higher Categories and Homotopical Algebra PDF Author: Denis-Charles Cisinski
Publisher: Cambridge University Press
ISBN: 1108473202
Category : Mathematics
Languages : en
Pages : 449

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Book Description
At last, a friendly introduction to modern homotopy theory after Joyal and Lurie, reaching advanced tools and starting from scratch.

A Study in Derived Algebraic Geometry

A Study in Derived Algebraic Geometry PDF Author: Dennis Gaitsgory
Publisher: American Mathematical Society
ISBN: 1470452855
Category : Mathematics
Languages : en
Pages : 436

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Book Description
Derived algebraic geometry is a far-reaching generalization of algebraic geometry. It has found numerous applications in other parts of mathematics, most prominently in representation theory. This volume develops deformation theory, Lie theory and the theory of algebroids in the context of derived algebraic geometry. To that end, it introduces the notion of inf-scheme, which is an infinitesimal deformation of a scheme and studies ind-coherent sheaves on such. As an application of the general theory, the six-functor formalism for D-modules in derived geometry is obtained. This volume consists of two parts. The first part introduces the notion of ind-scheme and extends the theory of ind-coherent sheaves to inf-schemes, obtaining the theory of D-modules as an application. The second part establishes the equivalence between formal Lie group(oids) and Lie algebr(oids) in the category of ind-coherent sheaves. This equivalence gives a vast generalization of the equivalence between Lie algebras and formal moduli problems. This theory is applied to study natural filtrations in formal derived geometry generalizing the Hodge filtration.

Homotopy Theory and Arithmetic Geometry – Motivic and Diophantine Aspects

Homotopy Theory and Arithmetic Geometry – Motivic and Diophantine Aspects PDF Author: Frank Neumann
Publisher: Springer Nature
ISBN: 3030789772
Category : Mathematics
Languages : en
Pages : 223

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Book Description
This book provides an introduction to state-of-the-art applications of homotopy theory to arithmetic geometry. The contributions to this volume are based on original lectures by leading researchers at the LMS-CMI Research School on ‘Homotopy Theory and Arithmetic Geometry - Motivic and Diophantine Aspects’ and the Nelder Fellow Lecturer Series, which both took place at Imperial College London in the summer of 2018. The contribution by Brazelton, based on the lectures by Wickelgren, provides an introduction to arithmetic enumerative geometry, the notes of Cisinski present motivic sheaves and new cohomological methods for intersection theory, and Schlank’s contribution gives an overview of the use of étale homotopy theory for obstructions to the existence of rational points on algebraic varieties. Finally, the article by Asok and Østvær, based in part on the Nelder Fellow lecture series by Østvær, gives a survey of the interplay between motivic homotopy theory and affine algebraic geometry, with a focus on contractible algebraic varieties. Now a major trend in arithmetic geometry, this volume offers a detailed guide to the fascinating circle of recent applications of homotopy theory to number theory. It will be invaluable to research students entering the field, as well as postdoctoral and more established researchers.

Simplicial Methods for Operads and Algebraic Geometry

Simplicial Methods for Operads and Algebraic Geometry PDF Author: Ieke Moerdijk
Publisher: Springer Science & Business Media
ISBN: 3034800525
Category : Mathematics
Languages : en
Pages : 186

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Book Description
"This book is an introduction to two higher-categorical topics in algebraic topology and algebraic geometry relying on simplicial methods. It is based on lectures delivered at the Centre de Recerca Matemàtica in February 2008, as part of a special year on Homotopy Theory and Higher Categories"--Foreword

Algebraic Geometry over C∞-Rings

Algebraic Geometry over C∞-Rings PDF Author: Dominic Joyce
Publisher: American Mathematical Soc.
ISBN: 1470436450
Category : Mathematics
Languages : en
Pages : 152

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Book Description
If X is a manifold then the R-algebra C∞(X) of smooth functions c:X→R is a C∞-ring. That is, for each smooth function f:Rn→R there is an n-fold operation Φf:C∞(X)n→C∞(X) acting by Φf:(c1,…,cn)↦f(c1,…,cn), and these operations Φf satisfy many natural identities. Thus, C∞(X) actually has a far richer structure than the obvious R-algebra structure. The author explains the foundations of a version of algebraic geometry in which rings or algebras are replaced by C∞-rings. As schemes are the basic objects in algebraic geometry, the new basic objects are C∞-schemes, a category of geometric objects which generalize manifolds and whose morphisms generalize smooth maps. The author also studies quasicoherent sheaves on C∞-schemes, and C∞-stacks, in particular Deligne-Mumford C∞-stacks, a 2-category of geometric objects generalizing orbifolds. Many of these ideas are not new: C∞-rings and C∞ -schemes have long been part of synthetic differential geometry. But the author develops them in new directions. In earlier publications, the author used these tools to define d-manifolds and d-orbifolds, “derived” versions of manifolds and orbifolds related to Spivak's “derived manifolds”.

Axiomatic, Enriched and Motivic Homotopy Theory

Axiomatic, Enriched and Motivic Homotopy Theory PDF Author: John Greenlees
Publisher: Springer Science & Business Media
ISBN: 9781402018343
Category : Mathematics
Languages : en
Pages : 412

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Book Description
The NATO Advanced Study Institute "Axiomatic, enriched and rna tivic homotopy theory" took place at the Isaac Newton Institute of Mathematical Sciences, Cambridge, England during 9-20 September 2002. The Directors were J.P.C.Greenlees and I.Zhukov; the other or ganizers were P.G.Goerss, F.Morel, J.F.Jardine and V.P.Snaith. The title describes the content well, and both the event and the contents of the present volume reflect recent remarkable successes in model categor ies, structured ring spectra and homotopy theory of algebraic geometry. The ASI took the form of a series of 15 minicourses and a few extra lectures, and was designed to provide background, and to bring the par ticipants up to date with developments. The present volume is based on a number of the lectures given during the workshop. The ASI was the opening workshop of the four month programme "New Contexts for Stable Homotopy Theory" which explored several themes in greater depth. I am grateful to the Isaac Newton Institute for providing such an ideal venue, the NATO Science Committee for their funding, and to all the speakers at the conference, whether or not they were able to contribute to the present volume. All contributions were refereed, and I thank the authors and referees for their efforts to fit in with the tight schedule. Finally, I would like to thank my coorganizers and all the staff at the Institute for making the ASI run so smoothly. J.P.C.GREENLEES.

Motivic Homotopy Theory

Motivic Homotopy Theory PDF Author: Bjorn Ian Dundas
Publisher: Springer Science & Business Media
ISBN: 3540458972
Category : Mathematics
Languages : en
Pages : 228

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Book Description
This book is based on lectures given at a summer school on motivic homotopy theory at the Sophus Lie Centre in Nordfjordeid, Norway, in August 2002. Aimed at graduate students in algebraic topology and algebraic geometry, it contains background material from both of these fields, as well as the foundations of motivic homotopy theory. It will serve as a good introduction as well as a convenient reference for a broad group of mathematicians to this important and fascinating new subject. Vladimir Voevodsky is one of the founders of the theory and received the Fields medal for his work, and the other authors have all done important work in the subject.