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BOIS-MARIE IHES Annual Newsletter | Issue 14 | 2018

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BOIS-MARIE IHES Annual Newsletter | Issue 14 | 2018 BOIS-MARIE IHES Annual Newsletter | Issue 14 | 2018 Page 4 Page 9 Hadamard Lectures IHES by Ingrid Daubechies 60th Anniversary celebrations Page 6 "Arithmetic and Algebraic Geometry": A conference in honour of Ofer Gabber on the occasion of his 60th birthday INSTITUT DES HAUTES ÉT UDES SCIENTIFIQUES 60 ANS Le Bois-Marie, 35 route de Chartres, 91440 Bures-sur-Yvette, France +33 1 60 92 66 00 | [email protected] | www.ihes.fr IHES, founding member of Editorial Scientific research is not a spontaneous phenomenon (…) it is something to be worked on, that can be cultivated". This is what Léon Motchane wrote after he founded IHES early in " the summer of 1958. Offering researchers the best possible environment for their work and allowing them to dedicate themselves exclusively to their research has always been IHES’ mission and its strength. Visitors to the Institute are invariably struck by the serene and studious atmosphere emanating from the site. "Bois-Marie" is an invitation to the richest of daydreams. On entering the scientific building, the intensity of exchanges in scientific events or informal conversations is equally striking. A chalkboard becomes a collective research enterprise. The questions that both invited and permanent Professors address at IHES are deep ones; their work is an inspiring model of rigour and intransigence. In a world where speed is of the essence, the Institute gives its researchers the luxury of taking their time, the time it takes to let an idea emerge and then to develop that idea, sometimes over decades. The financial equilibrium achieved by IHES with a combination of private and institutional funds, French and international partners, endowment and operating funds offers scientists the guarantee of complete freedom. This unique institution for fundamental research, based on excellence, freedom and exchanges continues to play a key role in the scientific community. A group like BNP Paribas uses advanced mathematics on a daily basis and we are proud that we have chosen to support the Institute by becoming a "major donor". I have agreed to become the Co-Chair of its new Campaign Committee with Philippe Camus, to convince other companies and sponsors to contribute to IHES’ mission. Since 1958, the Institute has been turning Motchane’s visionary dream into reality. Join me this autumn to celebrate sixty years spent at the avant-garde of science! Jean-Laurent Bonnafé, Campaign Committee Co-Chair Contents 3-4-5 10 12 Events Professor Recollections from Content Robert Penner IHES, M. Caillat and V. Touchant 6-7-8-9 11 Agenda Photo credits 60th Anniversary Development IHES, M.-C. Vergne programme Graphic design www.blossom-creation.com Translation Hélène Wilkinson Traduction 2 | BOIS-MARIE events A conference to pay tribute to Marcel Berger IHES hosted the international conference "Riemannian Geometry, past, present and future: an Homage to Marcel Berger" from December 6 to 9, 2017. Odile Berger, her daughters and grand-children Marcel Berger passed away on October 15, Marcel’s influence could be felt during the The staff of IHES and the facilities provided 2016 at the age of eighty-nine. In addition to talks which were all of a very high quality, both made this conference a truly exceptional creating a school of Riemannian geometry, he for their scientific content and for the quality success with 102 officially registered was Director of IHES from 1985 until 1993. of the exposition. Deep results were described participants and we would like to thank the in a convivial atmosphere, including the proofs Institute for their hospitality and help with the The idea, summarised in the title, was to of a couple of conjectures, and we believe that organisation. present a panorama of Riemannian Geometry the graduate students who participated in this and its recent trends. The list of speakers event benefited greatly from it. A special issue of the Annales de l’Institut reflected this general idea, and ranged from Fourier will be dedicated to the speakers’ mathematicians who have known Marcel’s On Friday, December 8, a recollection scientific contributions. The journal’s policy is group for a long time, to young people at an session was organised, in the presence of that the articles are freely accessible online as early stage of their careers, including one Marcel’s family. Participants could share soon as they are accepted. former student of M. Berger, D. Hulin, and their personal memories with the public. two mathematical "grandsons", G. Carron M. Gromov recounted his recollections via Gérard Besson, Research Director, CNRS and C. Guillarmou. It had always been videoconferencing. Friends of Marcel delivered and Pierre Bérard, Emeritus Professor, M. Berger’s wish that seminar lectures should moving speeches about his habits in his université de Grenoble be accessible to beginners. professional, or in his private life. "Combinatorics and Arithmetic for Physics" meeting Cours de l’IHES The 2017-2018 videos are on The third edition of "Combinatorics and Arithmetic for Physics" (CAP) took place YouTube: on 9 and 10 November 2017, at IHES. The meeting brings together some 20 participants, mostly Russian and European. Vincent Vargas The meeting’s focus is on questions of discrete "Liouville Conformal Field Combinatorics and Arithmetic mathematics and number theory with an Theory and the DOZZ Formula" for Physics: special days emphasis on computability. (November 2017) 9-10 November 2017 Centre de conférences Marilyn et James Simons Problems are drawn mainly from theoretical Bures-sur-Yvette, France Hugo Duminil-Copin physics (renormalisation, combinatorial "The Self-avoiding Walk Model" Organisers Speakers physics, geometry) or related to its models. Gérard H. E. DUCHAMP Nicolas Behr (Paris 7) (March 2018) Vincel HOANG NGOC MINH Marek Bozejko (Wrocław) Computation, based on combinatorial structures Maxim KONTSEVITCH Pierre Cartier (IHES) Gleb KOSHEVOY Gérard H.E. Duchamp (Paris 13) (graphs, trees, words, automata, semirings, Vladimir Fock (Strasbourg) Bertrand Eynard Hoàng Ngoc Minh (Lille2/Paris 13) bases) or classic structures (operators, Hopf Maxim Kontsevitch (IHES) "Topological Recursion, from Dimity Grigoryev (CNRS-Lille 1) algebras, evolution equations, special functions, Sponsor Gleb Koshevoy (Poncelet Lab, IHES) Enumerative Geometry to GDR Pierre Lairez (INRIA-LIX) categories) are good candidates for computer- « Renormalisation » Karol Penson (Paris 6) Integrability" renorm.math.cnrs.fr Leila Schneps (CNRS-Paris 6) based implantation and experimentation (March 2018) Web announcement lipn.univ-paris13.fr/~ngocminh/CAP3.html From the start, these meetings have been Francis Brown supported by GDR Renormalisation and "Mixed Modular Motives and benefited from the facilities at IHES. Modular Forms for SL2 (Z)" (April 2018) The next meeting will be held at IHES on 24 and 25 October 2018. Sergiu Klainerman "On the Mathematical Theory Gérard Duchamp, IHP, Professor, of Black Holes" Université Paris-Nord and (June 2018) Vincel Hoang Ngoc Minh, Professor, Université de Lille 3 | BOIS-MARIE events Hadamard lectures This year, the Hadamard lectures, which are organised by the foundation of the same name, were given by Ingrid Daubechies on 19 February at IHES, on the topic "Time-frequency Location and Applications". I. Daubechies, Professor at Duke University, is a member of the National Academy of Science in the US, a foreign member of the Académie des Sciences de Paris and a former President of the International Aain Connes Mathematical Union. The objective of I. Daubechies’ Hadamard "Quantum Gravity: Physics and lectures was to present a corpus of some mathematical analysis tools developed Philosophy" at IHES and applied over the past thirty years. The idea is to decompose a signal, function A workshop held from 24 - 27 October thanks to funding from the Philosophy of or operator, so as to combine local data Canonical Quantum Gravity ERC project was organised by T. Damour, G. Catren, both as a time and a frequency variable. E. During and F. Zalamea. As such, these decompositions can be considered as improvements on the Research in quantum gravity represents a de Haro (Universiteit van Amsterdam) then Fourier transform, the latter only enabling particularly suitable ground for a productive explored the conceptual lessons to be learnt to pass from one variable to the other. In confrontation between physics and from holographic principles generally and from a different physical context, in which time philosophy. The workshop brought together the AdS/CFT correspondence in particular, is replaced by localisation and frequency internationally renowned physicists and while A. Connes (IHES) discussed the reasons by momentum, these decompositions are philosophers with the twofold objective of for coupling gravity and the standard model fundamental in quantum mechanics and assessing the key conceptual problems that in light of the new geometric paradigm are akin to microlocal analysis in the theory research in quantum gravity encounters, and from noncommutative geometry. The third of partial differential equations. explore the philosophical significance of the day focused on the status of space-time in ideas that have emerged over the past twenty the various quantum gravity programmes: In her lectures, I. Daubechies gradually years. Talks focused on transversal questions, D. Dieks (Universiteit Utrecht) and Y. Dolev introduced the most important of these and more particularly on the principles and (Bar-Ilan University) explored
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