Diophantine Approximation and Nevanlinna Theory
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Nominations for President
ISSN 0002-9920 (print) ISSN 1088-9477 (online) of the American Mathematical Society September 2013 Volume 60, Number 8 The Calculus Concept Inventory— Measurement of the Effect of Teaching Methodology in Mathematics page 1018 DML-CZ: The Experience of a Medium- Sized Digital Mathematics Library page 1028 Fingerprint Databases for Theorems page 1034 A History of the Arf-Kervaire Invariant Problem page 1040 About the cover: 63 years since ENIAC broke the ice (see page 1113) Solve the differential equation. Solve the differential equation. t ln t dr + r = 7tet dt t ln t dr + r = 7tet dt 7et + C r = 7et + C ln t ✓r = ln t ✓ WHO HAS THE #1 HOMEWORK SYSTEM FOR CALCULUS? THE ANSWER IS IN THE QUESTIONS. When it comes to online calculus, you need a solution that can grade the toughest open-ended questions. And for that there is one answer: WebAssign. WebAssign’s patent pending grading engine can recognize multiple correct answers to the same complex question. Competitive systems, on the other hand, are forced to use multiple choice answers because, well they have no choice. And speaking of choice, only WebAssign supports every major textbook from every major publisher. With new interactive tutorials and videos offered to every student, it’s not hard to see why WebAssign is the perfect answer to your online homework needs. It’s all part of the WebAssign commitment to excellence in education. Learn all about it now at webassign.net/math. 800.955.8275 webassign.net/math WA Calculus Question ad Notices.indd 1 11/29/12 1:06 PM Notices 1051 of the American Mathematical Society September 2013 Communications 1048 WHAT IS…the p-adic Mandelbrot Set? Joseph H. -
Number Theory, Analysis and Geometry
Number Theory, Analysis and Geometry Dorian Goldfeld • Jay Jorgenson • Peter Jones Dinakar Ramakrishnan • Kenneth A. Ribet John Tate Editors Number Theory, Analysis and Geometry In Memory of Serge Lang 123 Editors Dorian Goldfeld Jay Jorgenson Department of Mathematics Department of Mathematics Columbia University City University of New York New York, NY 10027 New York, NY 10031 USA USA [email protected] [email protected] Peter Jones Dinakar Ramakrishnan Department of Mathematics Department of Mathematics Yale University California Institute of Technology New Haven, CT 06520 Pasadena, CA 91125 USA USA [email protected] [email protected] Kenneth A. Ribet John Tate Department of Mathematics Department of Mathematics University of California at Berkeley Harvard University Berkeley, CA 94720 Cambridge, MA 02138 USA USA [email protected] [email protected] ISBN 978-1-4614-1259-5 e-ISBN 978-1-4614-1260-1 DOI 10.1007/978-1-4614-1260-1 Springer New York Dordrecht Heidelberg London Library of Congress Control Number: 2011941121 © Springer Science+Business Media, LLC 2012 All rights reserved. This work may not be translated or copied in whole or in part without the written permission of the publisher (Springer Science+Business Media, LLC, 233 Spring Street, New York, NY 10013, USA), except for brief excerpts in connection with reviews or scholarly analysis. 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. -
BLOCH's PRINCIPLE Contents 1. Bloch's Heuristic Principle 2 1.1
BLOCH’S PRINCIPLE WALTER BERGWEILER Abstract. A heuristic principle attributed to Andr´eBloch says that a family of holomorphic functions is likely to be normal if there is no nonconstant entire functions with this property. We discuss this principle and survey recent results that have been obtained in connection with it. We pay special attention to properties related to exceptional values of derivatives and existence of fixed points and periodic points, but we also discuss some other instances of the principle. Contents 1. Bloch’s heuristic principle 2 1.1. Introduction 2 1.2. The basic examples 2 1.3. The theorems of Arzel`a-Ascoli and Marty 3 1.4. Zalcman’s Lemma 4 1.5. Zalcman’s formalization of the heuristic principle 4 1.6. Further examples 6 1.7. Other applications of Zalcman’s Lemma 7 1.8. A modified Bloch principle 10 1.9. Quasinormality 12 2. Exceptional values of derivatives 13 2.1. Introduction 13 2.2. A generalization of Zalcman’s Lemma 14 2.3. Multiple values of derivatives 15 2.4. Exceptional values of differential polynomials 18 2.5. Meromorphic functions with derivatives omitting zero 19 3. Fixed points and periodic points 20 3.1. Introduction 20 2000 Mathematics Subject Classification. Primary 30D45; Secondary 30D20, 30D35. Key words and phrases. Normal family, quasinormal, Zalcman lemma, exceptional value, fixed point, periodic point. Supported by the G.I.F., the German–Israeli Foundation for Scientific Research and Devel- opment, Grant G -809-234.6/2003, and by the Alexander von Humboldt Foundation. 1 2 WALTER BERGWEILER 3.2. -
Value Distribution Theory and Teichmüller's
Value distribution theory and Teichmüller’s paper “Einfache Beispiele zur Wertverteilungslehre” Athanase Papadopoulos To cite this version: Athanase Papadopoulos. Value distribution theory and Teichmüller’s paper “Einfache Beispiele zur Wertverteilungslehre”. Handbook of Teichmüller theory, Vol. VII (A. Papadopoulos, ed.), European Mathematical Society, 2020. hal-02456039 HAL Id: hal-02456039 https://hal.archives-ouvertes.fr/hal-02456039 Submitted on 27 Jan 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. VALUE DISTRIBUTION THEORY AND TEICHMULLER’S¨ PAPER EINFACHE BEISPIELE ZUR WERTVERTEILUNGSLEHRE ATHANASE PAPADOPOULOS Abstract. This survey will appear in Vol. VII of the Hendbook of Teichm¨uller theory. It is a commentary on Teichm¨uller’s paper “Einfache Beispiele zur Wertverteilungslehre”, published in 1944, whose English translation appears in that volume. Together with Teichm¨uller’s paper, we survey the development of value distri- bution theory, in the period starting from Gauss’s work on the Fundamental Theorem of Algebra and ending with the work of Teichm¨uller. We mention the foundational work of several mathe- maticians, including Picard, Laguerre, Poincar´e, Hadamard, Borel, Montel, Valiron, and others, and we give a quick overview of the various notions introduced by Nevanlinna and some of his results on that theory. -
Otices of The
OTICES OF THE AMERICAN MATHEMATICAL SOCIETY 1992 Cole Prize in Algebra page 275 1992 Award for Distinguished Public Service page 278 1992 Citation for Public Service page 281 National Science Foundation Budget Request for Fiscal Year 1993 page 286 AMS Task Force on Employment Report to the Mathematical Community, Part 1: Academic Hiring Survey 1991-1992 page 311 Bethlehem Meeting (April 11-12) page 326 APRIL 1992, VOLUME 39, NUMBER 4 Providence, Rhode Island, USA ISSN 0002-9920 Calendar of AMS Meetings and Conferences This calendar lists all meetings and conferences approved prior to the date this is possible. Abstracts should be submitted on special forms which are available issue went to press. The summer and annual meetings are joint meetings of the in many departments of mathematics and from the headquarters office of the So Mathematical Association of America and the American Mathematical Society. The ciety. Abstracts of papers to be presented at the meeting must be received at the meeting dates which fall rather far in the future are subject to change; this is par headquarters of the Society in Providence, Rhode Island, on or before the deadline ticularly true of meetings to which no numbers have been assigned. Programs of given below for the meeting. The abstract deadlines listed below should be care the meetings will appear in the issues indicated below. First and supplementary fully reviewed since an abstract deadline may expire before publication of a first announcements of the meetings will have appeared in earlier issues. Abstracts of announcement. Note that the deadline for abstracts for consideration for presenta papers presented at a meeting of the Society are published in the joumal Abstracts tion at special sessions is usually three weeks earlier than that specified below. -
NEVANLINNA THEORY and NORMAL FAMILIES ”, a Critical Survey of the Work Done by Various Authors in This Area, Has Been Prepared by Me Under the Supervision of Dr
NEVANLINNA THEORY AND NORMAL FAMILIES A Dissertation Submitted to the University of Delhi in Partial Fulfilment of the Requirements for the Award of the Degree of MASTER OF PHILOSOPHY IN MATHEMATICS By MANISHA SAINI DEPARTMENT OF MATHEMATICS UNIVERSITYOF DELHI DELHI-110007 January 2015 arXiv:1810.07015v1 [math.CV] 14 Oct 2018 DECLARATION This dissertation entitled “NEVANLINNA THEORY AND NORMAL FAMILIES ”, a critical survey of the work done by various authors in this area, has been prepared by me under the supervision of Dr. Sanjay Kumar, Associate Professor, Department of Mathematics, Deen Dayal Upadhyaya College, University of Delhi for the submission to the University of Delhi as partial fulfilment for the award of the degree of Master of Philosophy in Mathematics. I, hereby also declare that, to the best of my knowledge, the work presented in this dissertation, either in part or full, has not been submitted to any other University or elsewhere for the award of any degree or diploma. ( Manisha Saini ) Dr. Sanjay Kumar Prof. Ajay Kumar Supervisor & Associate Professor Head Department of Mathematics Department of Mathematics Deen Dayal Upadhyaya College University of Delhi University of Delhi Delhi-110007 ACKNOWLEDGEMENT It is a great pleasure for me to express intense gratitude to my M.Phil. dissertation advisor Dr. Sanjay Kumar for his keen interest in my topic of dissertation, guidance, encouragement and patience throughout the writing of the dissertation. Despite of his busy schedule, he has given me enough time. I am indeed indebted to him. I am delighted to take the opportunity to express my sincere thanks to Prof. -
First Fundamental Theorem of Nevanlinna Theory MAT 205B
First fundamental Theorem of Nevanlinna Theory MAT 205B Ojesh Koul June 10, 2018 1 MAT 205B Nevanlinna Theory The theory aims to describe the value distribution of meromorphic functions by looking at various formulae connecting the values of meromorphic functions with the distribution of its zeros and poles. In the beginning we will derive some of these formulae and later use them to get some connections with main "characteristics" of meromorphic functions. In the next section we will describe some preliminary results which will prove useful in our later endeavors. 1 Preliminary Results @ Let D be a bounded region with boundary Γ consisting of piecewise analytic curves, @n denote the differentiation along inwardly directed normal vector to Γ, and ∆ be the 2-D Laplacian operator. The following formula is called the second Green's formula ZZ Z @v @u (u∆v − v∆u)dσ = − u − v dl (1) D Γ @n @n The above formula can be derived from the regular Green's formula by applying it to @v @v (−u @y ; u @x ) ZZ @u @v @u @v Z @v u∆v + + dσ = −u dl D @x @x @y @y Γ @n Reversing u and v and subtracting we get the second Green's formula. Next we need the concept of Green's function. On a domain D the Green's function is a function G(ζ; z) defined for ζ; z 2 D; ζ 6= z, satisfying the following 1. For each z 2 D G(ζ; z) = − ln jζ − zj + hz(ζ) where hz is a harmonic function in D and continuous in D. -
Lars Ahlfors Entered the University of Helsinki, Where His Teachers Were Two Internationally Known Math- Ematicians, Ernst Lindelöf and Rolf Nevanlinna
NATIONAL ACADEMY OF SCIENCES LARS VALERIAN AHLFORS 1907–1996 A Biographical Memoir by FREDERICK GEHRING Any opinions expressed in this memoir are those of the author and do not necessarily reflect the views of the National Academy of Sciences. Biographical Memoirs, VOLUME 87 PUBLISHED 2005 BY THE NATIONAL ACADEMIES PRESS WASHINGTON, D.C. LARS VALERIAN AHLFORS April 18, 1907–October 11, 1996 BY FREDERICK GEHRING PERSONAL AND PROFESSIONAL HISTORY ARS AHLFORS WAS BORN in Helsinki, Finland, on April 18, L 1907. His father, Axel Ahlfors, was a professor of mechanical engineering at the Institute of Technology in Helsinki. His mother, Sievä Helander, died at Lars’s birth. As a newborn Lars was sent to the Åland Islands to be taken care of by two aunts. He returned to his father’s home in Helsinki by the age of three. At the time of Lars’s early childhood, Finland was under Russian sovereignty but with a certain degree of autonomy, and civil servants, including professors, were able to enjoy a fairly high standard of living. Unfortunately, all this changed radically during World War I, the Russian Revolution, and the Finnish civil war that followed. There was very little food in 1918, and Lars’s father was briefly imprisoned by the Red Guard. For historical reasons the inhabitants of Finland are divided into those who have Finnish or Swedish as their mother tongue. The Ahlfors family was Swedish speaking, so Lars attended a private school where all classes were taught in Swedish. He commented that the teaching of math- ematics was mediocre, but credited the school with helping 3 4 BIOGRAPHICAL MEMOIRS him become almost fluent in Finnish, German, and English, and less so in French. -
Math in Moscow Common History
Scientific WorkPlace® • Mathematical Word Processing • lt\TEX Typesetting Scientific Word®• Computer Algebra Plot 30 Animated + cytlndrtcal (-1 + 2r,21ru,- 1 + lr) 0 ·-~""'- r0 .......o~ r PodianY U rN~ 2.110142 UIJIIectdl' 1 00891 -U!NtdoiZ 3.!15911 v....,_ Animated plots tn sphertc:al coorcttrud:es ,. To make an animated plot in spherieal coordinates 1 Type an exprwsslon In !hr.. v.Nbles . 2 Wllh the Insertion point In the expression. choose Plot 3D The neXI example shows a sphere that grows from radius 1 to ,. Plot 3D Animated + SpMrtcal The Gold Standard for Mathematical Publishing Scientific WorkPlace and Scientific Word Version 5.5 make writing, sharing, and doing mathematics easier. You compose and edit your documents directly on the screen, without having to think in a programming language. A click of a button allows you to typeset your documents in lf.T£X. You choose to print with or without LATEX typesetting, or publish on the web. Scientific WorkPlace and Scientific Word enable both professionals and support staff to produce stunning books and articles. Also, the integrated computer algebra system in Scientific WorkPlace enables you to solve and plot equations, animate 20 and 30 plots, rotate, move, and fly through 30 plots, create 30 implicit plots, and more. ..- MuPAD MuPAD. Pro Pro 111fO!Ifii~A~JetriS)'Itfll "':' Version 4 MuPAD Pro is an integrated and open mathematical problem solving environment for symbo lic and numeric computing. Visit our website for details. cK.ichan SOFTWARE, INC , Visit our website for free trial versions of all our products. www.mackic han.com/notices • Email: [email protected] • Toll free : 87 7-724-9673 --CPAA-2007-- communications on Pure and Applied Analysis ISSN 1534-0392 (print); ISSN 1553-5258 (electronic) ' ' CPAA, covered in Science Citation Index-Expanded (SCI Editorial board ' ' ' ' E), publishes original research papers of the highest quality Editors in Chief: ' ' ' Shouchuan Hu ' in all the major areas of analysis and its applications, with a ' . -
NORMAL FAMILIES: NEW PERSPECTIVES Over Twenty Years Ago, on the Way to a Partial Explication of the Phenomenon Known As Bloch'
BULLETIN (New Series) OF THE AMERICAN MATHEMATICAL SOCIETY Volume 35, Number 3, July 1998, Pages 215{230 S 0273-0979(98)00755-1 NORMAL FAMILIES: NEW PERSPECTIVES LAWRENCE ZALCMAN Abstract. This paper surveys some surprising applications of a lemma char- acterizing normal families of meromorphic functions on plane domains. These include short and efficient proofs of generalizations of (i) the Picard Theorems, (ii) Gol’dberg’s Theorem (a meromorphic function on C which is the solution of a first-order algebraic differential equation has finite order), and (iii) the Fatou-Julia Theorem (the Julia set of a rational function of degree d 2is the closure of the repelling periodic points). We also discuss Bloch’s Principle≥ and provide simple solutions to some problems of Hayman connected with this principle. Over twenty years ago, on the way to a partial explication of the phenomenon known as Bloch’s Principle, I proved a little lemma characterizing normal families of holomorphic and meromorphic functions on plane domains [68]. Over the years, the lemma has grown and, in dextrous hands, proved amazingly versatile, with applications to a wide variety of topics in function theory and related areas. With the renewed interest in normal families1 (arising largely from the important role they play in complex dynamics), it seems sensible to survey some of the most striking of these applications to the one-variable theory, with the aim of making this technique available to as broad an audience as possible. That is the purpose of this report. One pleasant aspect of the theory is that judicious application of the lemma often leads to proofs which seem almost magical in their brevity. -
Integral Points and Vojta's
TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY Volume 364, Number 2, February 2012, Pages 767–784 S 0002-9947(2011)05320-1 Article electronically published on September 15, 2011 INTEGRAL POINTS AND VOJTA’S CONJECTURE ON RATIONAL SURFACES YU YASUFUKU Abstract. Using an inequality by Corvaja and Zannier about gcd’s of polyno- mials in S-units, we verify Vojta’s conjecture (with respect to integral points) for rational surfaces and triangular divisors. This amounts to a gcd inequal- G2 ity for integral points on m. The argument in the proof is generalized to give conditions under which Vojta’s conjecture on a variety implies Vojta’s conjecture on its blowup. 1. Introduction Building on the work of Charles Osgood [11] which connected Roth’s theorem with Nevanlinna theory, Paul Vojta [15] formulated a precise dictionary between value distribution theory and diophantine approximations. Using this dictionary, he translated Griffiths’ conjecture in complex analysis to a powerful height inequal- ity for rational points of smooth varieties [15, Main Conjecture 3.4.3]. Vojta’s conjecture tells us how diophantine approximation on a variety is controlled by its canonical divisor, and it has profound consequences in both arithmetic and geometry: its known cases include Schmidt’s subspace theorem (Schmidt [13] and Schlickewei [12]) and two of Faltings’ major results (Mordell conjecture [4] for curves and Lang’s conjecture [5] for abelian varieties), and its unsolved cases include the Bombieri–Lang conjecture and the abc conjecture. As indicated by these examples, Vojta’s conjecture is very difficult to prove in general. As the geometry of the blowup is closely related to the original variety, one would expect Vojta’s conjecture on the variety and on its blowup to be similar. -
Orbital Counting Via Mixing and Unipotent Flows
Clay Mathematics Proceedings Volume 8, 2008 Orbital counting via Mixing and Unipotent flows Hee Oh Contents 1. Introduction: motivation 1 2. Adeles: de¯nition and basic properties 5 3. General strategy on orbital counting 8 4. Equidistribution of semisimple periods via unipotent flows 11 5. Well-rounded sequence and Counting rational points 14 6. Mixing and Hecke points 20 7. Bounds toward the Ramanujan conjecture on the automorphic spectrum 22 8. Counting via mixing and the wavefront property 25 9. A problem of Linnik: Representations of integers by an invariant polynomial II 29 References 32 This note is an expanded version of my lectures given at the Clay summer school in 2007. 1. Introduction: motivation Let X be a projective algebraic variety de¯ned over Q, that is, X is the set of (equivalence classes of) zeros of homogeneous polynomials with coe±cients in Q. The set X(Q) of rational points in X consists of rational zeros of the polynomials. The following is a classical question in number theory: \understand the set X(Q) of rational points": More detailed questions can be formulated as follows: (1) Is X(Q) non-empty? (2) If non-empty, is X(Q) in¯nite? (3) If in¯nite, is X(Q) Zariski dense in X? (4) If Zariski dense, setting XT := fx 2 X(Q) : \ size"(x) < T g; what is the asymptotic growth rate of #XT as T ! 1? °c 2008 Clay Mathematics Institute 1 2 HEE OH (5) Interpret the asymptotic growth rate of #XT in terms of geometric invariants of X (6) Describe the asymptotic distribution of XT as T ! 1? A basic principle in studying these questions is that (1.1) \the geometry of X governs the arithmetic of X": A good example demonstrating this philosophy is the Mordell conjecture proved by Faltings [30]: Theorem 1.2.