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On the Semicontinuity of the Mod 2 Spectrum of Hypersurface Singularities
1 ON THE SEMICONTINUITY OF THE MOD 2 SPECTRUM OF HYPERSURFACE SINGULARITIES Andrew Ranicki (Edinburgh) http://www.maths.ed.ac.uk/eaar Bill Bruce 60 and Terry Wall 75 Liverpool, 18-22 June, 2012 2 A mathematical family tree Christopher Zeeman Frank Adams Terry Wall Andrew Casson Andrew Ranicki 3 The BNR project on singularities and surgery I Since 2011 have joined Andr´asN´emethi(Budapest) and Maciej Borodzik (Warsaw) in a project on the topological properties of the singularities of complex hypersurfaces. I The aim of the project is to study the topological properties of the singularity spectrum, defined using refinements of the eigenvalues of the monodromy of the Milnor fibre. I The project combines singularity techniques with algebraic surgery theory to study the behaviour of the spectrum under deformations. I Morse theory decomposes cobordisms of manifolds into elementary operations called surgeries. I Algebraic surgery does the same for cobordisms of chain complexes with Poincar´eduality { generalized quadratic forms. I The applications to singularities need a relative Morse theory, for cobordisms of manifolds with boundary and the algebraic analogues. 4 Fibred links I A link is a codimension 2 submanifold Lm ⊂ Sm+2 with neighbourhood L × D2 ⊂ Sm+2. I The complement of the link is the (m + 2)-dimensional manifold with boundary (C;@C) = (cl.(Sm+2nL × D2); L × S1) such that m+2 2 S = L × D [L×S1 C : I The link is fibred if the projection @C = L × S1 ! S1 can be extended to the projection of a fibre bundle p : C ! S1, and there is given a particular choice of extension. -
Pterossauros Nasciam Sem a Capacidade De Voar
NOTAS 1 Pterossauros nasciam sem a capacidade de voar Os filhotes de pterossauros, répteis ala- dos já extintos, contemporâneos dos dinossauros, rompiam seus ovos prontos para andar, mas não para bater asas e ga- nhar os ares. Assim que nasciam, os ossos Ovos fossilizados da cintura estavam formados. Isso permi- do pterossauro Hamipterus tia que eles se apoiassem sobre as patas tianshanensis e traseiras e dessem os primeiros passos. reconstituição Porém, a estrutura óssea que dá suporte artística da espécie aos movimentos do músculo peitoral, essencial para sustentar o voo, ainda não estava totalmente constituída. Os recém- -nascidos também não tinham todos os dentes, limitação que provavelmente os impedia de se alimentar sozinhos. Para sobreviver até que os ossos de apoio das asas e os dentes estivessem completos, os filhotes tinham de permanecer um bom tempo sob o cuidado dos pais. Esse cenário, sobre o desenvolvimento embrio- nário e os primeiros movimentos, ainda tímidos, dos filhotes de pterossauros, é sugerido em um estudo feito por paleon- tólogos brasileiros e chineses (Science, 1º de dezembro). “O descompasso entre o desenvolvimento dos ossos da cintura e os da musculatura peitoral indica que os pterossauros não conseguiam voar ao nascer”, comenta o paleontólogo Ale- xander Kellner, do Museu Nacional da Universidade Federal do Rio de Janeiro (UFRJ), um dos autores do trabalho. Com o auxílio de imagens de tomografia com- putadorizada, o grupo analisou o interior de 16 ovos de pterossauros da espécie Hamipterus tianshanensis, que viveu há cerca de 120 milhões de anos na bacia de Turpan-Hami, no noroeste da China. -
Noncommutative Localization in Algebra and Topology
Noncommutative localization in algebra and topology ICMS Edinburgh 2002 Edited by Andrew Ranicki Electronic version of London Mathematical Society Lecture Note Series 330 Cambridge University Press (2006) Contents Dedication . vii Preface . ix Historical Perspective . x Conference Participants . xi Conference Photo . .xii Conference Timetable . xiii On atness and the Ore condition J. A. Beachy ......................................................1 Localization in general rings, a historical survey P. M. Cohn .......................................................5 Noncommutative localization in homotopy theory W. G. Dwyer . 24 Noncommutative localization in group rings P. A. Linnell . 40 A non-commutative generalisation of Thomason's localisation theorem A. Neeman . 60 Noncommutative localization in topology A. A. Ranicki . 81 v L2-Betti numbers, Isomorphism Conjectures and Noncommutative Lo- calization H. Reich . 103 Invariants of boundary link cobordism II. The Blanch¯eld-Duval form D. Sheiham . 143 Noncommutative localization in noncommutative geometry Z. Skoda· ........................................................220 vi Dedicated to the memory of Desmond Sheiham (13th November 1974 ¡ 25th March 2005) ² Cambridge University (Trinity College), 1993{1997 B.A. Hons. Mathematics 1st Class, 1996 Part III Mathematics, Passed with Distinction, 1997 ² University of Edinburgh, 1997{2001 Ph.D. Invariants of Boundary Link Cobordism, 2001 ² Visiting Assistant Professor, Mathematics Department, University of California at Riverside, 2001{2003 ² Research Instructor, International University Bremen (IUB), 2003{2005 vii Publications: 1. Non-commutative Characteristic Polynomials and Cohn Localization Journal of the London Mathematical Society (2) Vol. 64, 13{28 (2001) http://arXiv.org/abs/math.RA/0104158 2. Invariants of Boundary Link Cobordism Memoirs of the American Mathematical Society, Vol. 165 (2003) http://arXiv.org/abs/math.AT/0110249 3. Whitehead Groups of Localizations and the Endomorphism Class Group Journal of Algebra, Vol. -
MY MOTHER TEOFILA REICH-RANICKI Andrew Ranicki Edinburgh German Circle, 28Th February, 2012 2 Timeline
1 MY MOTHER TEOFILA REICH-RANICKI Andrew Ranicki Edinburgh German Circle, 28th February, 2012 2 Timeline I 12th March, 1920. Born inL´od´z,Poland. I 22nd July, 1942. Married to Marcel in the Warsaw Ghetto. I 3rd February, 1943. Marcel and Tosia escape from Ghetto. I 1943-1944 Hidden by Polish family near Warsaw. I 7th September, 1944. Liberation by Red Army. I 1948-1949 London: Marcel is a Polish diplomat. I 30th December, 1948. Son Andrew born in London. I 1949-1958 Warsaw: Marcel writes about German literature. I 1958. Move from Poland to Germany. I 1959-1973 Hamburg: Marcel at Die Zeit. I 1973- Frankfurt a.M.: Marcel at the Frankfurter Allgemeine Zeitung. "Pope of German literature". I 1999 Exhibition of the Warsaw Ghetto drawings. I 29th April, 2011. Tosia dies in Frankfurt a.M. 3 Tosia's names I Tosia = Polish diminutive of Teofila. I 1920-1942 Teofila Langnas, maiden name. I 1942-1945 Teofila Reich, on marriage to Marcel Reich. I 1945-1958 Teofila Ranicki, after Marcel changes name to Ranicki, as more suitable for a Polish diplomat than Reich. I 1958- Teofila Reich-Ranicki, after Marcel changes name to Reich-Ranicki on return to Germany (where he had gone to school). 4 Tosia's parents Father: Pawe l Langnas, 1885-1940 Mother: Emilia Langnas, 1886-1942 5 L´od´z,1927-1933 I German school. I 6 L´od´z,1933-1939 I Polish school. I Interested in art, cinema, literature { but not mathematics! I Graduation photo 7 21st January, 1940 I Tosia was accepted for studying art at an Ecole´ des Beaux Arts, Paris, to start on 1st September, 1939. -
The Legacy of Norbert Wiener: a Centennial Symposium
http://dx.doi.org/10.1090/pspum/060 Selected Titles in This Series 60 David Jerison, I. M. Singer, and Daniel W. Stroock, Editors, The legacy of Norbert Wiener: A centennial symposium (Massachusetts Institute of Technology, Cambridge, October 1994) 59 William Arveson, Thomas Branson, and Irving Segal, Editors, Quantization, nonlinear partial differential equations, and operator algebra (Massachusetts Institute of Technology, Cambridge, June 1994) 58 Bill Jacob and Alex Rosenberg, Editors, K-theory and algebraic geometry: Connections with quadratic forms and division algebras (University of California, Santa Barbara, July 1992) 57 Michael C. Cranston and Mark A. Pinsky, Editors, Stochastic analysis (Cornell University, Ithaca, July 1993) 56 William J. Haboush and Brian J. Parshall, Editors, Algebraic groups and their generalizations (Pennsylvania State University, University Park, July 1991) 55 Uwe Jannsen, Steven L. Kleiman, and Jean-Pierre Serre, Editors, Motives (University of Washington, Seattle, July/August 1991) 54 Robert Greene and S. T. Yau, Editors, Differential geometry (University of California, Los Angeles, July 1990) 53 James A. Carlson, C. Herbert Clemens, and David R. Morrison, Editors, Complex geometry and Lie theory (Sundance, Utah, May 1989) 52 Eric Bedford, John P. D'Angelo, Robert E. Greene, and Steven G. Krantz, Editors, Several complex variables and complex geometry (University of California, Santa Cruz, July 1989) 51 William B. Arveson and Ronald G. Douglas, Editors, Operator theory/operator algebras and applications (University of New Hampshire, July 1988) 50 James Glimm, John Impagliazzo, and Isadore Singer, Editors, The legacy of John von Neumann (Hofstra University, Hempstead, New York, May/June 1988) 49 Robert C. Gunning and Leon Ehrenpreis, Editors, Theta functions - Bowdoin 1987 (Bowdoin College, Brunswick, Maine, July 1987) 48 R. -
Contemporary Mathematics 288
CONTEMPORARY MATHEMATICS 288 Global Differential Geometry: The Mathematical Legacy ·of Alfred Gray International Congress on Differential Geometry September 18-23, 2000 Bilbao, Spain Marisa Fernandez Joseph A. Wolf Editors http://dx.doi.org/10.1090/conm/288 Selected Titles In This Series 288 Marisa Fernandez and Joseph A. Wolf, Editors, Global differential geometry: The mathematical legacy of Alfred Gray, 2001 287 Marlos A. G. Viana and Donald St. P. Richards, Editors, Algebraic methods in statistics and probability, 2001 286 Edward L. Green, Serkan HO!~ten, Reinhard C. Laubenbacher, and Victoria Ann Powers, Editors, Symbolic computation: Solving equations in algebra, geometry, and engineering, 2001 285 Joshua A. Leslie and Thierry P. Robart, Editors, The geometrical study of differential equations, 2001 284 Gaston M. N'Guerekata and Asamoah Nkwanta, Editors, Council for African American researchers in the mathematical sciences: Volume IV, 2001 283 Paul A. Milewski, Leslie M. Smith, Fabian Waleffe, and Esteban G. Tabak, Editors, Advances in wave interaction and turbulence, 2001 282 Arlan Ramsay and Jean Renault, Editors, Gruupoids in analysiR, gcnmetry, and physics, 2001 281 Vadim Olshevsky, Editor, Structured matrices in mathematics, computer science, and engineering II, 2001 280 Vadim Olshevsky, Editor, Structured matrices in mathematics, computer science, and engineering I, 2001 279 Alejandro Adem, Gunnar Carlsson, and Ralph Cohen, Editors, Topology, geometry, and algebra: Interactions and new directions, 2001 278 Eric Todd Quinto, Leon Ehrenpreis, Adel Faridani, Fulton Gonzalez, and Eric Grinberg, Editors, Radon transforms and tomography, 2001 277 Luca Capogna and Loredana Lanzani, Editors, Harmonic analysis and boundary value problems, 2001 276 Emma Previato, Editor, Advances in algebraic geometry motivated by physics, 2001 275 Alfred G. -
Curriculum Vitae of Andrew Ranicki Born
Curriculum vitae of Andrew Ranicki Born: London, 30th December, 1948 Dual UK / German citizen Cambridge University, B. A. 1969 Ph. D. 1973 (supervised by Prof. J. F. Adams and Mr. A. J. Casson) Trinity College Yeats Prize, 1970 Cambridge University Smith Prize, 1972 Research Fellow of Trinity College, Cambridge, 1972{1977 Visiting Member, Institut des Hautes Etudes Scientifiques, Bures-sur-Yvette, France, 1973{1974 Princeton University : Instructor, 1977{1978 Assistant Professor, 1978{1982 Visiting Member, Institute for Advanced Studies, Princeton, 1981{1982 Edinburgh University : Lecturer, 1982{1987 Reader, 1987{1995 Professor of Algebraic Surgery, 1995{2016 Honorary Professorial Fellow, 2017{ Junior Whitehead Prize of London Mathematical Society, 1983 Visiting Professor, University of Kentucky, Lexington, 1985{1986 Visiting Member, SFB 170, G¨ottingenUniversity, 1987{1988 Fellow, Royal Society of Edinburgh, 1992 Senior Berwick Prize of London Mathematical Society, 1994 Leverhulme Trust Fellowship, 2001 Co-Organizer, Oberwolfach Conference on Topology, 1984{1991 British Topology Meeting, Edinburgh, 1985, 2001, 2011 Oberwolfach Conference on Surgery and L-theory, 1985, 1990 Oberwolfach Conference on the Novikov conjecture, 1993 Conference on Geometric Topology and Surgery, Josai, Japan, 1996 Special Session at AMS Regional Meeting, Memphis, Tennessee, 1997 Conference on Quadratic Forms and Their Applications, Dublin, 1999 Conference on Noncommutative Localization, ICMS, Edinburgh, 2002 Special Session at AMS Regional Meeting, Bloomington, -
2020 Leroy P. Steele Prizes
FROM THE AMS SECRETARY 2020 Leroy P. Steele Prizes The 2020 Leroy P. Steele Prizes were presented at the 126th Annual Meeting of the AMS in Denver, Colorado, in Jan- uary 2020. The Steele Prize for Mathematical Exposition was awarded to Martin R. Bridson and André Haefliger; the Prize for Seminal Contribution to Research in Analysis/Probability was awarded to Craig Tracy and Harold Widom; and the Prize for Lifetime Achievement was awarded to Karen Uhlenbeck. Citation for Riemannian geometry and group theory, that the field of Mathematical Exposition: geometric group theory came into being. Much of the 1990s Martin R. Bridson was spent finding rigorous proofs of Gromov’s insights and André Haefliger and expanding upon them. Metric Spaces of Non-Positive The 2020 Steele Prize for Math- Curvature is the outcome of that decade of work, and has ematical Exposition is awarded been the standard textbook and reference work throughout to Martin R. Bridson and André the field in the two decades of dramatic progress since its Haefliger for the book Metric publication in 1999. Spaces of Non-Positive Curvature, A metric space of non-positive curvature is a geodesic published by Springer-Verlag metric space satisfying (local) CAT(0) condition, that every in 1999. pair of points on a geodesic triangle should be no further Metric Spaces of Non-Positive apart than the corresponding points on the “comparison Martin R. Bridson Curvature is the authoritative triangle” in the Euclidean plane. Examples of such spaces reference for a huge swath of include non-positively curved Riemannian manifolds, modern geometric group the- Bruhat–Tits buildings, and a wide range of polyhedral ory. -
Assembly Maps in Bordism-Type Theories
Assembly maps in bordism-type theories Frank Quinn Preface This paper is designed to give a careful treatment of some ideas which have been in use in casual and imprecise ways for quite some time, partic- ularly some introduced in my thesis. The paper was written in the period 1984{1990, so does not refer to recent applications of these ideas. The basic point is that a simple property of manifolds gives rise to an elaborate and rich structure including bordism, homology, and \assembly maps." The essential property holds in many constructs with a bordism fla- vor, so these all immediately receive versions of this rich structure. Not ev- erything works this way. In particular, while bundle-type theories (including algebraic K-theory) also have assembly maps and similar structures, they have them for somewhat di®erent reasons. One key idea is the use of spaces instead of sequences of groups to orga- nize invariants and obstructions. I ¯rst saw this idea in 1968 lecture notes by Colin Rourke on Dennis Sullivan's work on the Hauptvermutung ([21]). The idea was expanded in my thesis [14] and article [15], where \assembly maps" were introduced to study the question of when PL maps are ho- motopic to block bundle projections. This question was ¯rst considered by Andrew Casson, in the special case of bundles over a sphere. The use of ob- struction spaces instead of groups was the major ingredient of the extension to more general base spaces. The space ideas were expanded in a di®erent direction by Buoncristiano, Rourke, and Sanderson [4], to provide a setting for generalized cohomology theories. -
Only a Comparison with Einstein Will Do Interview with Andrew Ranicki About His Father Marcel Reich-Ranicki, by Uwe Wittstock (FOCUS, 19 March, 2012)
Only a comparison with Einstein will do Interview with Andrew Ranicki about his father Marcel Reich-Ranicki, by Uwe Wittstock (FOCUS, 19 March, 2012) We lived in Warsaw and I was 8 years old when my father asked me: "Which German writers do you know?" Not a typical question for a child in Poland. But since I could think, I had the many book spines on my father's shelves in front of my eyes, so I listed: "Goethe, Heine, Thomas Mann, Schiller, Anna Seghers ..." My father thought I had read the names on the books. But I didn't need to. Though it wasn't important, I only needed to close my eyes and saw them before me. And at meals he would tell me about the books in such an exciting way that I loved to listen and many of these stories have stuck with me. When my parents decided in 1958 to go to Germany and to send me to an English language school in Hamburg, my life became complicated. I was 9 years old and spoke neither German nor English. But my father had a similar experience 30 years earlier. His mother sent him at the age of 9 from Poland to Berlin, and he had to learn German in just a few months so he could go to school. I have the impression that he mastered the language and literature rather well. It turned out that my talents were not linguistic in nature, but mathe- matical. I fell in love with the world of geometry and still love it today. -
January 2007 Prizes and Awards
January 2007 Prizes and Awards 4:25 P.M., Saturday, January 6, 2007 MATHEMATICAL ASSOCIATION OF AMERICA DEBORAH AND FRANKLIN TEPPER HAIMO AWARDS FOR DISTINGUISHED COLLEGE OR UNIVERSITY TEACHING OF MATHEMATICS In 1991, the Mathematical Association of America instituted the Deborah and Franklin Tepper Haimo Awards for Distinguished College or University Teaching of Mathematics in order to honor college or university teachers who have been widely recognized as extraordinarily successful and whose teaching effectiveness has been shown to have had influence beyond their own institutions. Deborah Tepper Haimo was president of the Association, 1991–1992. Citation Jennifer Quinn Jennifer Quinn has a contagious enthusiasm that draws students to mathematics. The joy she takes in all things mathematical is reflected in her classes, her presentations, her publications, her videos and her on-line materials. Her class assignments often include nonstandard activities, such as creating time line entries for historic math events, or acting out scenes from the book Proofs and Refutations. One student created a children’s story about prime numbers and another produced a video documentary about students’ perceptions of math. A student who had her for six classes says, “I hope to become a teacher after finishing my master’s degree and I would be thrilled if I were able to come anywhere close to being as great a teacher as she is.” Jenny developed a variety of courses at Occidental College. Working with members of the physics department and funded by an NSF grant, she helped develop a combined yearlong course in calculus and mechanics. She also developed a course on “Mathematics as a Liberal Art” which included computer discussions, writing assignments, and other means to draw technophobes into the course. -
Life the Universe Breakthrough Initiatives Introduction BREAKTHROU GHINITIATIVE S
Life the Universe Breakthrough Initiatives Introduction BREAKTHROU GHINITIATIVE S Pete5/21/2018 Klupar, BREAKTHROUGH PRIZE FOUNDATION CHIEF ENGINEER - [email protected] – 11 April 2018 2018 Breakthrough Prize Winners 2018 Breakthrough Prizes in Life Sciences Awarded: Joanne Chory, Don W. Cleveland, Kazutoshi Mori, Kim Nasmyth, and Peter Walter. New Horizons in Physics Prizes Awarded; 2018 Breakthrough Prize in Physics Awarded; Christopher Hirata, Douglas Stanford, and Charles L. Bennett, Gary Hinshaw, Norman Jarosik, Andrea Young. ($100,000) each Lyman Page Jr., David N. Spergel, and the WMAP Science Team New Horizons in Mathematics Prizes Awarded; Aaron Naber, Maryna Viazovska, Zhiwei Yun, and 2018 Breakthrough Prize in Mathematics Awarded; Wei Zhang. (7) ($300,000) each Christopher Hacon and James McKernan. (13) 3 5/21/2018 Breakthrough Junior Challenge 2016 2016 2017 Hillary Diane Andales. Submit application and video no later than July 1, 2018 at 11:59 PM Pacific Daylight Time Ages 13 to 18 $250K Scholarship $100K Lab $50K Teacher 2015 Ryan Chester Ohio 4 5/21/2018 5/21/2018 5 6 BTW 10um : current and future capabilities Watch VLT only survey, current camera: Can detect ~2 Earth radius rocky planets = ~10 Earth mass in Alpha Cen A&B system Full survey (VLT, Gemini, Magellan), new detector: -detector alone brings 4x gain in efficiency (same observation requires ¼ of the time). At equal exposure time, 2x gain in sensitivity: from 2 Earth radius / 10 Earth mass to 1.4 Earth radius / 3 Earth mass -Gemini and Magellan increases