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Manjul Bhargava
The Work of Manjul Bhargava Manjul Bhargava's work in number theory has had a profound influence on the field. A mathematician of extraordinary creativity, he has a taste for simple problems of timeless beauty, which he has solved by developing elegant and powerful new methods that offer deep insights. When he was a graduate student, Bhargava read the monumental Disqui- sitiones Arithmeticae, a book about number theory by Carl Friedrich Gauss (1777-1855). All mathematicians know of the Disquisitiones, but few have actually read it, as its notation and computational nature make it difficult for modern readers to follow. Bhargava nevertheless found the book to be a wellspring of inspiration. Gauss was interested in binary quadratic forms, which are polynomials ax2 +bxy +cy2, where a, b, and c are integers. In the Disquisitiones, Gauss developed his ingenious composition law, which gives a method for composing two binary quadratic forms to obtain a third one. This law became, and remains, a central tool in algebraic number theory. After wading through the 20 pages of Gauss's calculations culminating in the composition law, Bhargava knew there had to be a better way. Then one day, while playing with a Rubik's cube, he found it. Bhargava thought about labeling each corner of a cube with a number and then slic- ing the cube to obtain 2 sets of 4 numbers. Each 4-number set naturally forms a matrix. A simple calculation with these matrices resulted in a bi- nary quadratic form. From the three ways of slicing the cube, three binary quadratic forms emerged. -
Pleat Folding, 6.849 Fall 2010
Demaine, Demaine, Lubiw Courtesy of Erik D. Demaine, Martin L. Demaine, and Anna Lubiw. Used with permission. 1999 1 Hyperbolic Paraboloid Courtesy of Jenna Fizel. Used with permission. [Albers at Bauhaus, 1927–1928] 2 Circular Variation from Bauhaus [Albers at Bauhaus, 1927–1928] 3 Courtesy of Erik Demaine, Martin Demaine, Jenna Fizel, and John Ochsendorf. Used with permission. Virtual Origami Demaine, Demaine, Fizel, Ochsendorf 2006 4 Virtual Origami Demaine, Demaine, Fizel, Ochsendorf 2006 Courtesy of Erik Demaine, Martin Demaine, Jenna Fizel, and John Ochsendorf. Used with permission. 5 “Black Hexagon” Demaine, Demaine, Fizel 2006 Courtesy of Erik Demaine, Martin Demaine, and Jenna Fizel. Used with permission. 6 Hyparhedra: Platonic Solids [Demaine, Demaine, Lubiw 1999] 7 Courtesy of Erik Demaine, Martin Demaine, Jenna Fizel, and John Ochsendorf. Used with permission. Virtual Origami Demaine, Demaine, Fizel, Ochsendorf 2006 8 “Computational Origami” Erik & Martin Demaine MoMA, 2008– Elephant hide paper ~9”x15”x7” Courtesy of Erik Demaine and Martin Demaine. Used with permission. See also http://erikdemaine.org/curved/Computational/. 9 Peel Gallery, Houston Nov. 2009 Demaine & Demaine 2009 Courtesy of Erik Demaine and Martin Demaine. Used with permission. See also http://erikdemaine.org/curved/Limit/. 10 “Natural Cycles” Erik & Martin Demaine JMM Exhibition of Mathematical Art, San Francisco, 2010 Courtesy of Erik Demaine and Martin Demaine. Used with permission. See also http://erikdemaine.org/curved/NaturalCycles/. 11 Courtesy of Erik Demaine and Martin Demaine. Used with permission. See also http://erikdemaine.org/curved/BlindGlass/. Demaine & Demaine 2010 12 Hyperbolic Paraboloid Courtesy of Jenna Fizel. Used with permission. [Demaine, Demaine, Hart, Price, Tachi 2009/2010] 13 θ = 30° n = 16 Courtesy of Erik D. -
Algorithmic Folding Complexity∗
Algorithmic Folding Complexity∗ Jean Cardinal1, Erik D. Demaine2, Martin L. Demaine2, Shinji Imahori3, Tsuyoshi Ito4, Masashi Kiyomi5, Stefan Langerman1, Ryuhei Uehara5, Takeaki Uno6 1 D´epartement d'Informatique, Universit´eLibre de Bruxelles, CP 212, B-1050 Brussels, Belgium. e-mail: fjcardin,[email protected] 2 Computer Science and Artificial Intelligence Laboratory, Massachusetts Institute of Technol- ogy, Cambridge, MA 02139, USA. e-mail: fedemaine,[email protected] 3 Department of Computational Science and Engineering, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan. e-mail: [email protected] 4 Institute for Quantum Computing and School of Computer Science, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada. e-mail: [email protected] 5 School of Information Science, Japan Advanced Institute of Science and Technology, Ishikawa 923-1292, Japan. e-mail: fmkiyomi,[email protected] 6 National Institute of Informatics, Chiyoda-ku, Tokyo 101-8430, Japan. e-mail: [email protected] Abstract. How do we most quickly fold a paper strip (modeled as a line) to obtain a desired mountain-valley pattern of equidistant creases (viewed as a binary string)? Define the folding complexity of a mountain-valley string as the minimum number of simple folds required to construct it. We first show that the folding complexity of a length-n uniform string (all mountains or all valleys), and hence of a length-n pleat (alternating mountain/valley), is O(lg2 n). We also show that a lower bound of the complexity of the problems is Ω(lg2 n= lg lg n). Next we show that almost all mountain-valley patterns require Ω(n= lg n) folds, which means that the uniform and pleat foldings are relatively easy problems. -
ICTS POSTER Outside Bangalore
T A T A I N S T I T U T E O F F U N D A M E N T A L R E S E A R C H A HOMI BHABHA BIRTH CENTENARY & ICTS INAUGURAL EVENT International Centre Theoretical Sciences science without bo28 Decemberun 2009d29 -a 31 Decemberri e2009s Satish Dhawan Auditorium Faculty Hall Indian Institute of Science, Bangalore. www.icts.res.in/program/icts-ie INVITED SPEAKERS / PANELISTS INCLUDE FOUNDATION STONE CEREMONY Siva Athreya ISI, Bangalore OF ICTS CAMPUS Naama Barkai Weizmann Institute The foundation stone will be unveiled by Manjul Bhargava Princeton University Prof. C N R Rao, FRS 4:00 pm, 28 December 2009 Édouard Brézin École Normale Supérieure Amol Dighe TIFR Michael Green DAMTP, Cambridge Chandrashekhar Khare UCLA Yamuna Krishnan NCBS-TIFR Lyman Page Princeton University Jaikumar Radhakrishnan TIFR C. S. Rajan TIFR Sriram Ramaswamy IISc G. Rangarajan IISc C. N. R. Rao JNCASR Subir Sachdev Harvard University K. Sandeep CAM-TIFR Sriram Shastry UC Santa Cruz PUBLIC LECTURES Ashoke Sen HRI J. N. Tata Auditorium, IISc (FREE AND OPEN TO ALL) Anirvan Sengupta Rutgers University K. R. Sreenivasan Abdus Salam ICTP Michael Atiyah University of Edinburgh Andrew Strominger Harvard University Truth and Beauty in Mathematics and Physics 5:30 pm, 27 December 2009 Raman Sundrum Johns Hopkins University Ajay Sood IISc David Gross KITP, Santa Barbara The Role of Theory in Science Tarun Souradeep IUCAA 5:30 pm, 28 December 2009 Eitan Tadmor University of Maryland Albert Libchaber Rockefeller University Sandip Trivedi TIFR The Origin of Life: from Geophysics to Biology? Mukund Thattai NCBS-TIFR 5:30 pm, 30 December 2009 S. -
Gaps Between Primes
P. I. C. M. – 2018 Rio de Janeiro, Vol. 2 (363–380) GAPS BETWEEN PRIMES J M Abstract We discuss recent advances on weak forms of the Prime k-tuple Conjecture, and its role in proving new estimates for the existence of small gaps between primes and the existence of large gaps between primes. 1 Introduction It follows from the Prime Number Theorem that the average gap between primes less than X is of size roughly log X when X is large. We expect, however, that occasionally these gaps are rather smaller than log X, and occasionally rather larger. Specifically, based on random models and numerical evidence, we believe that the largest and smallest gaps are as described in the following two famous conjectures1. Conjecture 1 (Twin Prime Conjecture). There are infinitely many pairs of primes which differ by exactly 2. th Conjecture 2 (Cramér’s Conjecture, weak form). Let pn denote the n prime. Then 2+o(1) sup (pn+1 pn) = (log X) : pn X Ä Moreover, the Twin Prime Conjecture can be thought of as a special case of the far- reaching Prime k-tuple Conjecture describing more general patterns of many primes. Conjecture 3 (Prime k-tuple Conjecture). Let L1;:::;Lk be integral linear functions k Li (n) = ai n + bi such that for every prime p there is an integer np with Qi=1 Li (np) coprime to p. Then there are infinitely many integers n such that all of L1(n);:::;Lk(n) are primes. The author is funded by a Clay Research Fellowship. -
Program of the Sessions San Diego, California, January 9–12, 2013
Program of the Sessions San Diego, California, January 9–12, 2013 AMS Short Course on Random Matrices, Part Monday, January 7 I MAA Short Course on Conceptual Climate Models, Part I 9:00 AM –3:45PM Room 4, Upper Level, San Diego Convention Center 8:30 AM –5:30PM Room 5B, Upper Level, San Diego Convention Center Organizer: Van Vu,YaleUniversity Organizers: Esther Widiasih,University of Arizona 8:00AM Registration outside Room 5A, SDCC Mary Lou Zeeman,Bowdoin upper level. College 9:00AM Random Matrices: The Universality James Walsh, Oberlin (5) phenomenon for Wigner ensemble. College Preliminary report. 7:30AM Registration outside Room 5A, SDCC Terence Tao, University of California Los upper level. Angles 8:30AM Zero-dimensional energy balance models. 10:45AM Universality of random matrices and (1) Hans Kaper, Georgetown University (6) Dyson Brownian Motion. Preliminary 10:30AM Hands-on Session: Dynamics of energy report. (2) balance models, I. Laszlo Erdos, LMU, Munich Anna Barry*, Institute for Math and Its Applications, and Samantha 2:30PM Free probability and Random matrices. Oestreicher*, University of Minnesota (7) Preliminary report. Alice Guionnet, Massachusetts Institute 2:00PM One-dimensional energy balance models. of Technology (3) Hans Kaper, Georgetown University 4:00PM Hands-on Session: Dynamics of energy NSF-EHR Grant Proposal Writing Workshop (4) balance models, II. Anna Barry*, Institute for Math and Its Applications, and Samantha 3:00 PM –6:00PM Marina Ballroom Oestreicher*, University of Minnesota F, 3rd Floor, Marriott The time limit for each AMS contributed paper in the sessions meeting will be found in Volume 34, Issue 1 of Abstracts is ten minutes. -
Annual Report 2010–11
ANNUAL REPORT 2010–11 ANNUAL REPORT 2010–11 The National Gallery of Australia is a Commonwealth (cover) authority established under the National Gallery Act 1975. Thapich Gloria Fletcher Dhaynagwidh (Thaynakwith) people The vision of the National Gallery of Australia is the Eran 2010 cultural enrichment of all Australians through access aluminium to their national art gallery, the quality of the national 270 cm (diam) collection, the exceptional displays, exhibitions and National Gallery of Australia, Canberra programs, and the professionalism of Gallery staff. acquired through the Founding Donors 2010 Fund, 2010 Photograph: John Gollings The Gallery’s governing body, the Council of the National Gallery of Australia, has expertise in arts administration, (back cover) corporate governance, administration and financial and Hans Heysen business management. Morning light 1913 oil on canvas In 2010–11, the National Gallery of Australia received 118.6 x 102 cm an appropriation from the Australian Government National Gallery of Australia, Canberra totalling $50.373 million (including an equity injection purchased with funds from the Ruth Robertson Bequest Fund, 2011 of $15.775 million for development of the national in memory of Edwin Clive and Leila Jeanne Robertson collection and $2 million for the Stage 1 South Entrance and Australian Indigenous Galleries project), raised $27.421 million, and employed 262 full‑time equivalent staff. © National Gallery of Australia 2011 ISSN 1323 5192 All rights reserved. No part of this publication can be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording or any information storage and retrieval system, without permission in writing from the publisher. -
A Salamander Sculpture Barn Raising
BRIDGES Mathematical Connections in Art, Music, and Science A Salamander Sculpture Barn Raising George W. Hart Computer Science Department. Stony Brook University Stony Brook, NY 11794-4400, USA E-mrul:[email protected] Abstract Salamanders is a thirty-piece wooden sculpture that was group assembled by thirty volunteers in an exciting sculpture "barn raising" when I was artist-in-residence at M.I.T. in OctoberlNovember 2003. It is composed of laser-cut salamander-shaped components which lie in the planes of a rhombic triacontahedron and were mathematically designed to weave through each other and exactly fit together on the outside. 1. Introduction M.e. Escher playfully incorporated chameleons and other reptiles or amphibians in his two-dimensional geometric artwork [1]. In homage to his creative spirit, I designed my sculpture Salamanders to feature flat salamanders which interweave in three dimensions. Figure 1 shows it hanging temporarily inside a window overlooking the construction of Frank O. Gehry's new Stata Center at M.I.T. [2], where the sculpture will eventually reside. Figure 1: Salamanders 54 2004 Bridges Proceedings My ultimate concept, if funding can be found, is for a large metal double sphere as shown in Figure 2. The inner and outer spheres are each made of thirty identical two-headed salamander shapes. Each part is parallel to an identical part similarly oriented in the other sphere. I find it visually interesting to show that the same salamander parts can be joined in these two contrasting arrangements---one very open and one very interlocked. It is a puzzle with two very different solutions. -
The Newsletter of the Statistical Society of Canada Issn 1489-5927
S S C LIAISON Volume 21 Number 4 October 2007 ON S ERIC SAMP Jessica Utts, Chair of the Committee of Presidents of Statistical Societies, presents Jeffrey Rosenthal with the 2007 COPSS Award Message from Reports Upcoming Conferences Consultants’ Forum the President 2 and Workshops 14 1 12 Notice to Advertisers News Message from 4 The Canadian 16 the Interim Editors Journal of Statistics: 1 Announcements Coming Attractions Obituary 7 13 17 THE NEWSLETTER OF THE STATISTICAL SOCIETY OF CANADA ISSN 1489-5927 MESSAGES Message from the President Christian Genest, Ph.D., P.Stat. (Université Laval) ear members, elections electronically as soon as fea- a P.Stat. member. In the new By-Laws, D sible. It is too early to tell whether this the titles of some key officers would As you can tell easily from this issue of objective can be achieved as early as also be changed to better reflect their Liaison, the preparations for our next next spring, but we would appreciate responsibilities. Thus the SSC Secretary, Annual Meeting are coming along fine. it if you would ensure that your e-mail the Program Secretary and the Public Except for the contributed address is correct when you Relations Officer would be called the paper sessions, the scien- T renew your membership in Executive Secretary, the Meetings ES N tific program is practically E December. An ambitious Coordinator, and the Publications Of- G complete. Moreover, the E program of on-line serv- ficer, respectively. Moreover, the official ARIANN main local arrangements M ices is also in the works, French term for “CJS Managing Editor” have been finalized. -
Dear Aspirant with Regard
DEAR ASPIRANT HERE WE ARE PRESENTING YOU A GENRAL AWERNESS MEGA CAPSULE FOR IBPS PO, SBI ASSOT PO , IBPS ASST AND OTHER FORTHCOMING EXAMS WE HAVE UNDERTAKEN ALL THE POSSIBLE CARE TO MAKE IT ERROR FREE SPECIAL THANKS TO THOSE WHO HAS PUT THEIR TIME TO MAKE THIS HAPPEN A IN ON LIMITED RESOURCE 1. NILOFAR 2. SWETA KHARE 3. ANKITA 4. PALLAVI BONIA 5. AMAR DAS 6. SARATH ANNAMETI 7. MAYANK BANSAL WITH REGARD PANKAJ KUMAR ( Glory At Anycost ) WE WISH YOU A BEST OF LUCK CONTENTS 1 CURRENT RATES 1 2 IMPORTANT DAYS 3 CUPS & TROPHIES 4 4 LIST OF WORLD COUNTRIES & THEIR CAPITAL 5 5 IMPORTANT CURRENCIES 9 6 ABBREVIATIONS IN NEWS 7 LISTS OF NEW UNION COUNCIL OF MINISTERS & PORTFOLIOS 13 8 NEW APPOINTMENTS 13 9 BANK PUNCHLINES 15 10 IMPORTANT POINTS OF UNION BUDGET 2012-14 16 11 BANKING TERMS 19 12 AWARDS 35 13 IMPORTANT BANKING ABBREVIATIONS 42 14 IMPORTANT BANKING TERMINOLOGY 50 15 HIGHLIGHTS OF UNION BUDGET 2014 55 16 FDI LLIMITS 56 17 INDIAS GDP FORCASTS 57 18 INDIAN RANKING IN DIFFERENT INDEXS 57 19 ABOUT : NABARD 58 20 IMPORTANT COMMITTEES IN NEWS 58 21 OSCAR AWARD 2014 59 22 STATES, CAPITAL, GOVERNERS & CHIEF MINISTERS 62 23 IMPORTANT COMMITTEES IN NEWS 62 23 LIST OF IMPORTANT ORGANIZATIONS INDIA & THERE HEAD 65 24 LIST OF INTERNATIONAL ORGANIZATIONS AND HEADS 66 25 FACTS ABOUT CENSUS 2011 66 26 DEFENCE & TECHNOLOGY 67 27 BOOKS & AUTHOURS 69 28 LEADER”S VISITED INIDIA 70 29 OBITUARY 71 30 ORGANISATION AND THERE HEADQUARTERS 72 31 REVOLUTIONS IN AGRICULTURE IN INDIA 72 32 IMPORTANT DAMS IN INDIA 73 33 CLASSICAL DANCES IN INDIA 73 34 NUCLEAR POWER -
Analytic Number Theory in Honor of Helmut Maier’S 60Th Birthday
springer.com Carl Pomerance, Michael Th. Rassias (Eds.) Analytic Number Theory In Honor of Helmut Maier’s 60th Birthday Presents the latest developments and applications by leading experts in Analytic Number Theory Contains contributions by mathematicians who have published jointly with Helmut Maier Contains practical material for graduate students and research mathematicians, as well as for computer scientists and engineers??????? ? This volume contains a collection of research and survey papers written by some of the most eminent mathematicians in the international community and is dedicated to Helmut Maier, whose own research has been groundbreaking and deeply influential to the field. Specific emphasis is given to topics regarding exponential and trigonometric sums and their behavior in short intervals, anatomy of integers and cyclotomic polynomials, small gaps in sequences of sifted prime numbers, oscillation theorems for primes in arithmetic progressions, inequalities related to the distribution of primes in short intervals, the Möbius function, Euler’s totient 1st ed. 2015, VIII, 379 p. function, the Riemann zeta function and the Riemann Hypothesis. Graduate students, research mathematicians, as well as computer scientists and engineers who are interested in pure and Printed book interdisciplinary research, will find this volume a useful resource. Contributors to this volume: Hardcover Bill Allombert, Levent Alpoge, Nadine Amersi, Yuri Bilu, Régis de la Bretèche, Christian Elsholtz, 99,99 € | £89.99 | $119.99 John B. Friedlander, Kevin Ford, Daniel A. Goldston, Steven M. Gonek, Andrew Granville, Adam J. [1] 106,99 € (D) | 109,99 € (A) | CHF Harper, Glyn Harman, D. R. Heath-Brown, Aleksandar Ivi, Geoffrey Iyer, Jerzy Kaczorowski, 118,00 Daniel M. -
Fall 2008 [Pdf]
Le Bulletin du CRM • crm.math.ca • Automne/Fall 2008 | Volume 14 – No 2 | Le Centre de recherches mathématiques The Fall 2008 Aisenstadt Chairs Four Aisenstadt Chair lecturers will visit the CRM during the 2008-2009 thematic year “Probabilistic Methods in Mathemat- ical Physics.” We report here on the series of lectures of Wendelin Werner (Université Paris-Sud 11) and Andrei Okounkov (Princeton University), both of whom are Fields Medalists, who visited the CRM in August and September 2008 respectively. The other Aisenstadt Chairs will be held by Svante Janson (Uppsala University) and Craig Tracy (University of California at Davis). Wendelin Werner Andrei Okounkov de Yvan Saint-Aubin (Université de Montréal) by John Harnad (Concordia University) Wendelin Werner est un A metaphor from an ancient fragment by Archilochus “The Fox spécialiste de la théo- knows many things but the Hedgehog knows one big thing” rie des probabilités. Il a was used by Isaiah Berlin as title and theme of his essay on Tol- obtenu son doctorat en stoy’s view of history (“. by nature a fox, but believed in be- 1993 sous la direction de ing a hedgehog”) [1]. It is also very suitably applied to styles in Jean-François Le Gall. Il science. In his presentation of the work of Andrei Okounkov est professeur au labo- when he was awarded the Fields medal at the 2006 Interna- ratoire de mathématiques tional Congress of Mathematicians in Madrid, Giovanni Felder à l’Université Paris-Sud said: “Andrei Okounkov’s initial area of research was group XI à Orsay depuis 1997, representation theory, with particular emphasis on combinato- ainsi qu’à l’École nor- rial and asymptotic aspects.