Cambridge University Press 978-0-521-70040-5 — Elliptic Cohomology Edited by Haynes R
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Algebra & Number Theory Vol. 7 (2013)
Algebra & Number Theory Volume 7 2013 No. 3 msp Algebra & Number Theory msp.org/ant EDITORS MANAGING EDITOR EDITORIAL BOARD CHAIR Bjorn Poonen David Eisenbud Massachusetts Institute of Technology University of California Cambridge, USA Berkeley, USA BOARD OF EDITORS Georgia Benkart University of Wisconsin, Madison, USA Susan Montgomery University of Southern California, USA Dave Benson University of Aberdeen, Scotland Shigefumi Mori RIMS, Kyoto University, Japan Richard E. Borcherds University of California, Berkeley, USA Raman Parimala Emory University, USA John H. Coates University of Cambridge, UK Jonathan Pila University of Oxford, UK J-L. Colliot-Thélène CNRS, Université Paris-Sud, France Victor Reiner University of Minnesota, USA Brian D. Conrad University of Michigan, USA Karl Rubin University of California, Irvine, USA Hélène Esnault Freie Universität Berlin, Germany Peter Sarnak Princeton University, USA Hubert Flenner Ruhr-Universität, Germany Joseph H. Silverman Brown University, USA Edward Frenkel University of California, Berkeley, USA Michael Singer North Carolina State University, USA Andrew Granville Université de Montréal, Canada Vasudevan Srinivas Tata Inst. of Fund. Research, India Joseph Gubeladze San Francisco State University, USA J. Toby Stafford University of Michigan, USA Ehud Hrushovski Hebrew University, Israel Bernd Sturmfels University of California, Berkeley, USA Craig Huneke University of Virginia, USA Richard Taylor Harvard University, USA Mikhail Kapranov Yale University, USA Ravi Vakil Stanford University, -
Arxiv:1908.02868V2 [Math.AT] 30 Dec 2020
A DE RHAM MODEL FOR COMPLEX ANALYTIC EQUIVARIANT ELLIPTIC COHOMOLOGY DANIEL BERWICK-EVANS AND ARNAV TRIPATHY Abstract. We construct a cocycle model for complex analytic equivariant elliptic co- homology that refines Grojnowski's theory when the group is connected and Devoto's when the group is finite. We then construct Mathai{Quillen type cocycles for equivari- ant elliptic Euler and Thom classes, explaining how these are related to positive energy representations of loop groups. Finally, we show that these classes give a unique complex analytic equivariant refinement of Hopkins' \theorem of the cube" construction of the MString-orientation of elliptic cohomology. Contents 1. Introduction 1 2. G-bundles on elliptic curves 5 3. A cocycle model for equivariant elliptic cohomology 13 4. Comparing with Grojnowski's equivariant elliptic cohomology 19 5. Comparing with Devoto's equivariant elliptic cohomology 21 6. Loop group representations and cocycle representatives of Thom classes 22 7. Equivariant orientations and the theorem of the cube 33 Appendix A. Background 38 References 42 1. Introduction Equivariant K-theory facilitates a rich interplay between representation theory and topology. For example, universal Thom classes come from representations of spin groups; power operations are controlled by the representation theory of symmetric groups; and the equivariant index theorem permits geometric constructions of representations of Lie groups. Equivariant elliptic cohomology is expected to lead to an even deeper symbiosis be- tween representation theory and topology. First evidence appears in the visionary work of Grojnowski [Gro07] and Devoto [Dev96]. Grojnowski's complex analytic equivariant elliptic arXiv:1908.02868v2 [math.AT] 30 Dec 2020 cohomology (defined for connected Lie groups) makes contact with positive energy repre- sentations of loop groups [And00, Gan14]. -
From Algebras to Varieties
F EATURE Principal Investigator Alexey Bondal Research Area:Mathematics From Algebras to Varieties geometry of varieties superlatively developed by Derived categories after Grothendieck Italian school of the late 19th and early 20th century. Both groups had very strong representatives, but Homological algebra is considered by they had scarce overlap in research. mathematicians to be one of the most formal Perhaps, one of the reasons for this strange state subjects within mathematics. Its formal austerity of affairs was a side effect of the great achievement requires a lot of efforts to come through basic of one of the best Grothendieck’s students, Pierre denitions and frightens off many of those who Deligne, who used complicated homological algebra starts studying the subject. This high level of to prove Weil conjectures. These conjectures are, formality of the theory gives an impression that it probably, more of arithmetic nature and do not is a ding an sich, something that has no possible have so much to do with geometry of algebraic way of comprehension for outsiders and efforts for varieties in the classical sense of Italian school. learning the theory would never be paid back. For years, applications of derived categories were After Alexander Grothendieck, the great creator developed rather in the area of number theoretical of modern homological algebra who introduced the and topological aspects of varieties and, later, in concept of derived categories, had left the stage Representation Theory than in classical geometry of where he occupied a central place for decades, the varieties. opinion that the homological theory had reached its bounds and become a useless formal theory Associative algebras was widely spread in the mathematical community. -
Localizations of E-Theory and Transchromatic Phenomena in Stable Homotopy Theory
NORTHWESTERN UNIVERSITY Localizations of E-Theory and Transchromatic Phenomena in Stable Homotopy Theory A DISSERTATION SUBMITTED TO THE GRADUATE SCHOOL IN PARTIAL FULFILLMENT OF THE REQUIREMENTS for the degree DOCTOR OF PHILOSOPHY Field of Mathematics By Paul VanKoughnett EVANSTON, ILLINOIS June 2018 2 ABSTRACT Localizations of E-Theory and Transchromatic Phenomena in Stable Homotopy Theory Paul VanKoughnett Chromatic homotopy theory studies a parametrization of stable homotopy theory in terms of algebraic objects called formal groups. Transchromatic homotopy theory is specifically concerned with the behavior of spaces and cohomology theories as these formal groups change in height. We pursue a central transchromatic object, the K(n − 1)- localization of a height n Morava E-theory En. We give a modular description of the coefficients of LK(n−1)En in terms of deformations of formal groups together with extra data about the (n − 1)th Lubin-Tate coordinate. We use this to describe co-operations and power operations in this transchromatic setting. As an application, we construct exotic multiplicative structures on LK(1)E2, not induced from the ring structure on E2 by K(1)-localization. 3 Acknowledgements I don't want to get much further beyond the title without thanking my advisor, Paul Goerss. Paul has been a knowledgeable, warm, and inspiring presence in my often be- leaguering grad school days. Besides being a chromatic homotopy theory guru always willing to initiate poor novices into some of the best math there is, he has always made sure that I make my confusion specific (a joke originally due to Steve Wilson). -
A Survey of Elliptic Cohomology
A Survey of Elliptic Cohomology Jacob Lurie Massachusetts Institute of Technology This paper is an expository account of the relationship between elliptic cohomology and the emerging subject of derived algebraic geometry. We begin in x1 with an overview of the classical theory of elliptic cohomology. In x2 we review the theory of E1-ring spectra and introduce the language of derived algebraic geometry. We apply this theory in x3, where we introduce the notion of an oriented group scheme and describe connection between oriented group schemes and equivariant cohomology theories. In x4 we sketch a proof of our main result, which relates the classical theory of elliptic cohomology to the classification of oriented elliptic curves. In x5 we discuss various applications of these ideas, many of which rely upon a special feature of elliptic cohomology which we call 2-equivariance. The theory that we are going to describe lies at the intersection of homotopy theory and algebraic geometry. We have tried to make our exposition accessible to those who are not specialists in algebraic topology; however, we do assume the reader is familiar with the language of algebraic geometry, particularly with the theory of elliptic curves. In order to keep our account readable, we will gloss over many details, particularly where the use of higher category theory is required. A more comprehensive account of the material described here, with complete definitions and proofs, will be given in [21]. In carrying out the work described in this paper, I have benefitted from the ideas of many people. I would like to thank Matthew Ando, Mark Behrens, Brian Conrad, Chris Douglas, Dan Freed, Tyler Lawson, Haynes Miller, Jack Morava, Charles Rezk, John Rognes, Stephan Stolz, Neil Strickland, Peter Teichner, Bertrand To¨en,and Gabriele Vezzosi for helpful discussions. -
Progress in Mathematics Volume 269
Progress in Mathematics Volume 269 Series Editors Hyman Bass Joseph Oesterlé Alan Weinstein For other titles published in this series, go to http://www.springer.com/series/4848 Algebra, Arithmetic, and Geometry In Honor of Yu. I. Manin Volume I Yuri Tschinkel Yuri Zarhin Editors Birkhäuser Boston • Basel • Berlin Editors Yuri Tschinkel Yuri Zarhin New York University Pennsylvania State University Department of Mathematics Eberly College of Science New York, NY 10012-1185 Department of Mathematics [email protected] University Park, PA 16802 [email protected] ISBN 978-0-8176-4744-5 e-ISBN 978-0-8176-4745-2 DOI 10.1007/978-0-8176-4745-2 Springer New York Dordrecht Heidelberg London Library of Congress Control Number: 2009939499 c Springer Science+Business Media, LLC 2009 All rights reserved. This work may not be translated or copied in whole or in part without the written permission of the publisher (Birkhäuser Boston, c/o Springer Science+Business Media, LLC, 233 Spring Street, New York, NY 10013, USA), except for brief excerpts in connection with reviews or scholarly anal- ysis. Use in connection with any form of information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed is forbidden. The use in this publication of trade names, trademarks, service marks, and similar terms, even if they are not identified as such, is not to be taken as an expression of opinion as to whether or not they are subject to proprietary rights. Printed on acid-free paper Birkhäuser is part of Springer Science+Business Media (www.birkhauser.com) v Preface Yuri Ivanovich Manin has made outstanding contributions to algebra, algebraic geometry, number theory, algorithmic complexity, noncommutative geometry and mathematical physics. -
World Premier International Research Center Initiative (WPI) FY 2017 WPI Project Progress Report
World Premier International Research Center Initiative (WPI) FY 2017 WPI Project Progress Report Host Institution The University of Tokyo Host Institution Head Makoto Gonokami Kavli Institute for the Physics and Mathematics of Research Center Center Director Hitoshi Murayama the Universe Common instructions: * Unless otherwise specified, prepare this report from the timeline of 31 March 2018. * So as to base this fiscal year’s follow-up review on the “last” center project, please prepare this report from the perspective of the latest project plan. * Use yen (¥) when writing monetary amounts in the report. If an exchange rate is used to calculate the yen amount, give the rate. * Please prepare this report within 10-20 pages (excluding the appendices, and including Summary of State of WPI Center Project Progress (within 2 pages)). Summary of State of WPI Center Project Progress (write within 2 pages) Research Highlights This is our first report from the 5-year extension period of the WPI funding for which we have added 9 new challenges, as listed later in the body of the report. Among them, the first 4 are directly related to research. Here let us first summarize research highlights in accordance with their relevance to those 4 challenges. (1) create new areas and tools of statistics, integrating mathematics with observation and experiments: The JST CREST project “Statistical Computational Cosmology” led by N. Yoshida is aimed at developing fast imaging data analysis applications for the Subaru Hyper-Suprime Cam (HSC) survey. In 2017, the project members developed a deep convolutional neural-network that performs multi- label classification of supernovae. -
Strictly Commutative Complex Orientations of T Mf1(N)
Strictly Commutative Complex Orientations of T mf1(N) Dominik Absmeier Abstract We construct by adapting methods and results of Ando, Hopkins, Rezk and Wilson combined with results of Hopkins and Lawson strictly commu- tative complex orientations for the spectra of topological modular forms with level Γ1(N). 1 Introduction Ever since Quillen’s theorem in the 1970s showing that the Hopf algebroid (MU∗,MU∗MU) represents one-dimensional formal group laws and strict iso- morphism between those and the subsequent work of Mahowald, Ravenel, Wil- son, Morava, Hopkins and many others who exploited this result to the fullest it has become clear that the world of stable homotopy is intimately related to the world of smooth one dimensional formal groups. A natural source for for- mal groups is provided by abelian group schemes A who give rise to a formal group A by completion along the identity section. As the formal group of an n- dimensional abelian group scheme is itself n-dimensional one has to either look at specificb abelian group schemes with additional structures which allow one to split off an 1-dimensional summand of its formal group (see [BL10]) or one does the obvious thing first and looks at 1-dimensional abelian group schemes. There are basically two classes of those: 1. The multiplicative group Gm whose formal group Gm is realised by a very arXiv:2108.03079v1 [math.AT] 6 Aug 2021 well known complex oriented cohomology theory, complex K-theory. b 2. Elliptic curves. Contrary to the case of the multiplicative group, the formal group of an elliptic curve can have height 1 or 2 and thus could permit detection of elements on the 2-line of the Adams-Novikov spectral sequence. -
Algebra & N Umber Theory
Algebra & Number Theory Algebra & Number Theory Volume 3 No. 3 2009 Volume 3 2009 2009 No. 3 Vol. 3, No. 3 Algebra & Number Theory www.jant.org EDITORS MANAGING EDITOR EDITORIAL BOARD CHAIR Bjorn Poonen David Eisenbud Massachusetts Institute of Technology University of California Cambridge, USA Berkeley, USA BOARD OF EDITORS Georgia Benkart University of Wisconsin, Madison, USA Susan Montgomery University of Southern California, USA Dave Benson University of Aberdeen, Scotland Shigefumi Mori RIMS, Kyoto University, Japan Richard E. Borcherds University of California, Berkeley, USA Andrei Okounkov Princeton University, USA John H. Coates University of Cambridge, UK Raman Parimala Emory University, USA J-L. Colliot-Thel´ ene` CNRS, Universite´ Paris-Sud, France Victor Reiner University of Minnesota, USA Brian D. Conrad University of Michigan, USA Karl Rubin University of California, Irvine, USA Hel´ ene` Esnault Universitat¨ Duisburg-Essen, Germany Peter Sarnak Princeton University, USA Hubert Flenner Ruhr-Universitat,¨ Germany Michael Singer North Carolina State University, USA Edward Frenkel University of California, Berkeley, USA Ronald Solomon Ohio State University, USA Andrew Granville Universite´ de Montreal,´ Canada Vasudevan Srinivas Tata Inst. of Fund. Research, India Joseph Gubeladze San Francisco State University, USA J. Toby Stafford University of Michigan, USA Ehud Hrushovski Hebrew University, Israel Bernd Sturmfels University of California, Berkeley, USA Craig Huneke University of Kansas, USA Richard Taylor Harvard University, -
Elliptic Homology and Topological Modular Forms
Elliptic Homology and Topological Modular Forms Lennart Meier November 28, 2017 Abstract These are lecture notes on elliptic genera, elliptic homology and topological modular forms. They are based on a lecture course given in the summer term 2017 in Bonn. Please treat these informal notes with caution. If you find any mistakes (either typos or something more serious) or have other remarks, please contact the author. This (or any other) feedback is very welcome! Contents 1 Introduction 2 2 Bordism, genera and orientations 3 2.1 Homotopy colimits and limits . .3 2.2 Remarks about spectra . .4 2.3 Bordism . .5 2.4 Properties of Thom spaces and spectra . .7 2.5 Orientations . .9 2.6 Complex orientations . 11 2.7 Formal group laws . 12 2.8 π∗MU and the universal formal group law . 14 2.9 Rational formal group laws . 15 2.10 Mischenko’s theorem . 17 3 Algebraic geometry and elliptic genera 18 3.1 Schemes and group schemes . 18 3.2 Formal groups . 19 3.3 Elliptic curves over algebraically closed fields . 21 3.4 Elliptic curves over general base schemes . 23 3.5 Invariant differentials . 25 3.6 The formal group . 26 3.7 Weierstrass Elliptic genera . 27 3.8 The Jacobi quartic . 28 3.9 The Ochanine elliptic genus . 29 3.10 Elliptic integrals and logarithms . 30 3.11 Elliptic functions and exponentials . 31 3.12 Properties of the elliptic genus . 33 3.13 Geometric cobordism, Milnor manifolds and multiplicativity . 34 1 2 4 Stacks and elliptic cohomology 37 4.1 Landweber’s exact functor theorem . -
Rapport Annuel Annual Report 2014
Rapport Annuel Annual Report 2014 Le Bois-Marie • 35, route de Chartres • F-91440 Bures-sur-Yvette • France T +33 1 60 92 66 00 F +33 1 60 92 66 69 M [email protected] I www.ihes.fr Institut des Hautes Études Scientifiques Table des matières Mot du Président ......................................................................................................................... p. 4 Rapport scientifique Vie scientifique à l’IHÉS ......................................................................................................................... p. 8 • Distinction reçue ...................................................................................................................... p. 14 • Personnel permanent, recherches, conférences et publications Professeurs permanents ...................................................................................................................... p. 16 Chaire Léon Motchane ...................................................................................................................... p. 21 Directeurs de recherche CNRS / CEA à l’IHÉS ...................................................................................................................... p. 22 Professeur émérite ...................................................................................................................... p. 26 Professeur honoraire ...................................................................................................................... p. 27 Directeur et anciens directeurs ..................................................................................................................... -
Institut Des Hautes Ét Udes Scientifiques Rapport Annuel 2018
RAPPORT ANNUEL 2018 INSTITUT 60 ANS DES HAUTES ÉT U D E S SCIENTIFIQUES Fondation Reconnue d’Utilité Publique depuis 1981 IHES Rapport annuel 2018 | 1 TABLE DES MATIÈRES TABLE OF CONTENTS Message du Président P.3 A Word from the Chairman L’IHES en bref P.4 IHES in a nutshell Recherche et événements P.7 Research and Events Prix et disti ncti ons scienti fi ques P.8 Scienti fi c Awards Vie scienti fi que P.9 Scienti fi c Acti vity Professeurs P.19 Professors Professeurs permanents P.19 Permanent Professors Chercheurs CNRS à l’IHES P.26 CNRS Researchers at IHES Directeur P.30 Director Membres émérites P.31 Emeritus Members Chercheurs invités P.34 Invited Researchers Stati sti ques P.34 Stati sti cs Professeurs associés P.38 Associate Professors Programme général d’invitati ons P.46 General Invitati on Programme Post-doctorants P.52 Postdocs Événements P.54 Events Cours de l’IHES P.54 Cours de l’IHES Conférences et séminaires P.55 Conferences and Seminars Administrati on P.63 Management Gouvernance P.64 Governance Conseil scienti fi que P.64 Scienti fi c Council Conseil d’administrati on P.65 Board of Directors Souti ens insti tuti onnels P.66 Partners Situati on fi nancière P.67 Financial Report Rapport du commissaire aux comptes P.67 Statutory Auditor’s Report Bilan et compte de résultat P.70 Balance Sheets and Statements of Financial Acti viti es Note fi nancière P.72 Financial Notes Développement et communicati on P.74 Development and Communicati on Donateurs P.78 Donors Les Amis de l’IHES P.82 Les Amis de l’IHES Aperçu 2019 P.84 2019 Preview