Leonhard Euler : Life, Work and Legacy
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Ernst Zermelo Heinz-Dieter Ebbinghaus in Cooperation with Volker Peckhaus Ernst Zermelo
Ernst Zermelo Heinz-Dieter Ebbinghaus In Cooperation with Volker Peckhaus Ernst Zermelo An Approach to His Life and Work With 42 Illustrations 123 Heinz-Dieter Ebbinghaus Mathematisches Institut Abteilung für Mathematische Logik Universität Freiburg Eckerstraße 1 79104 Freiburg, Germany E-mail: [email protected] Volker Peckhaus Kulturwissenschaftliche Fakultät Fach Philosophie Universität Paderborn War burger St raße 100 33098 Paderborn, Germany E-mail: [email protected] Library of Congress Control Number: 2007921876 Mathematics Subject Classification (2000): 01A70, 03-03, 03E25, 03E30, 49-03, 76-03, 82-03, 91-03 ISBN 978-3-540-49551-2 Springer Berlin Heidelberg New York This work is subject to copyright. All rights are reserved, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broad- casting, reproduction on microfilm or in any other way, and storage in data banks. Duplication of this publication or parts thereof is permitted only under the provisions of the German Copyright Law of September 9, 1965, in its current version, and permission for use must always be obtained from Springer. Violations are liable for prosecution under the German Copyright Law. Springer is a part of Springer Science+Business Media springer.com © Springer-Verlag Berlin Heidelberg 2007 The use of general descriptive names, registered names, trademarks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant pro- tective laws and regulations and therefore free for general use. Typesetting by the author using a Springer TEX macro package Production: LE-TEX Jelonek, Schmidt & Vöckler GbR, Leipzig Cover design: WMXDesign GmbH, Heidelberg Printed on acid-free paper 46/3100/YL - 5 4 3 2 1 0 To the memory of Gertrud Zermelo (1902–2003) Preface Ernst Zermelo is best-known for the explicit statement of the axiom of choice and his axiomatization of set theory. -
GYRODYNAMICS Introduction to the Dynamics of Rigid Bodies
2 GYRODYNAMICS Introduction to the dynamics of rigid bodies Introduction. Though Newton wrote on many topics—and may well have given thought to the odd behavior of tops—I am not aware that he committed any of that thought to writing. But by Euler was active in the field, and it has continued to bedevil the thought of mathematical physicists. “Extended rigid bodies” are classical abstractions—alien both to relativity and to quantum mechanics—which are revealed to our dynamical imaginations not so much by commonplace Nature as by, in Maxwell’s phrase, the “toys of Youth.” That such toys behave “strangely” is evident to the most casual observer, but the detailed theory of their behavior has become notorious for being elusive, surprising and difficult at every turn. Its formulation has required and inspired work of wonderful genius: it has taught us much of great worth, and clearly has much to teach us still. Early in my own education as a physicist I discovered that I could not understand—or, when I could understand, remained unpersuaded by—the “elementary explanations” of the behavior of tops & gyros which are abundant in the literature. So I fell into the habit of avoiding the field, waiting for the day when I could give to it the time and attention it obviously required and deserved. I became aware that my experience was far from atypical: according to Goldstein it was in fact a similar experience that motivated Klein & Sommerfeld to write their 4-volume classic, Theorie des Kreisels (–). In November I had occasion to consult my Classical Mechanics II students concerning what topic we should take up to finish out the term. -
St Petersburg 8
Plan Your Trip 12 ©Lonely Planet Publications Pty Ltd St Petersburg “All you’ve got to do is decide to go and the hardest part is over. So go!” TONY WHEELER, COFOUNDER – LONELY PLANET Regis St Louis, Simon Richmond Contents PlanPlan Your Your Trip Trip page 1 4 Welcome to Top Itineraries ���������������20 Travelling to Moscow ����36 St Petersburg ������������������ 4 If You Like� ����������������������22 Museums St Petersburg’s Month by Month ������������24 & Galleries �������������������37 Top 10 ������������������������������� 6 With Kids ������������������������26 Eating ���������������������������39 What’s New �������������������� 13 Money-Saving Tips �������28 Drinking Need to Know �����������������14 & Nightlife ������������������ 43 Visas �������������������������������29 First Time Entertainment ������������ 46 St Petersburg �����������������16 Tours & Activities �����������31 Shopping ��������������������� 48 Getting Around �������������� 18 Visiting on a Cruise �������34 Explore St Petersburg 50 Historic Heart ����������������54 Vasilyevsky Island ������� 143 Day Trips from Sennaya & Kolomna ���104 Petrograd & St Petersburg ������������ 173 Vyborg Sides ��������������� 154 Smolny & Sleeping ���������������������186 Vosstaniya ��������������������121 Understand St Petersburg 197 St Petersburg History ������������������������� 200 Arts �������������������������������226 Today ���������������������������� 198 Architecture ����������������� 219 Literature ���������������������236 Survival Guide 241 Transport ���������������������242 -
Accurate Simulation of Rigid Body Rotation and Extensions to Lie Groups
Accurate Simulation of Rigid Body Rotation and Extensions to Lie Groups Sam Buss Dept. of Mathematics U.C. San Diego Visible Luncheon Gwyddor Cyfrifiador University of Swansea March 3, 2011 Topics: ◮ Algorithms for simulating rotating rigid bodies. ◮ All algorithms preserve angular momentum. ◮ Algorithms can be made energy preserving. ◮ Generalization to Lie group setting. Talk outline: 1. Rigid body rotations. 1st thru 4th order algorithms. Unexpected terms. 2. Generalization to Taylor series methods over Lie groups/Lie algebras. 3. Energy preservation based on Poinsot ellipsoid. 4. Numerical simulations and efficiency. 1 Part I: The simple rotating, rigid body I = Inertia matrix (tensor). ω L = Angular momentum. ω = Rotation axis & rate, L L = Iω (Euler’s equation) ω = I−1L ω˙ = I−1(L˙ ω Iω) − × ω¨ = ω ω˙ + I−1(L¨ ω˙ L 2ω L˙ + ω (ω L)) × − × − × × × ... ... ω = 2ω ω¨ ω (ω ω˙ ) + I−1[L 3ω L¨ 3ω˙ L˙ ω¨ L × − × × − × − × − × + ω˙ (ω L) + 2ω (ω˙ L) + 3ω (ω L˙ ) ω (ω (ω L))] × × × × × × − × × × Wobble: ω˙ = 0 even when no applied torque (L˙ = 0). 6 vL˙ = Rate of change of momentum = Applied Torque. 2 Framework for simulating rigid body motion We assume the rigid body has a known angular momentum, and the external torques are completely known. The orientation (and hence the angular velocity) is updated in discrete time steps, at times t0, t1, t2,.... Update Step: At a given time t , let h = ∆t = t t , and assume i i+1 − i orientation Ωi at time ti is known, and that momentum is known (at all times). Update step calculates a net rotation rate vector, ω¯, and sets Ωi+1 = Rhω¯ Ωi, where Rν performs a rotation around axis ν of angle ν . -
Leonhard Euler - Wikipedia, the Free Encyclopedia Page 1 of 14
Leonhard Euler - Wikipedia, the free encyclopedia Page 1 of 14 Leonhard Euler From Wikipedia, the free encyclopedia Leonhard Euler ( German pronunciation: [l]; English Leonhard Euler approximation, "Oiler" [1] 15 April 1707 – 18 September 1783) was a pioneering Swiss mathematician and physicist. He made important discoveries in fields as diverse as infinitesimal calculus and graph theory. He also introduced much of the modern mathematical terminology and notation, particularly for mathematical analysis, such as the notion of a mathematical function.[2] He is also renowned for his work in mechanics, fluid dynamics, optics, and astronomy. Euler spent most of his adult life in St. Petersburg, Russia, and in Berlin, Prussia. He is considered to be the preeminent mathematician of the 18th century, and one of the greatest of all time. He is also one of the most prolific mathematicians ever; his collected works fill 60–80 quarto volumes. [3] A statement attributed to Pierre-Simon Laplace expresses Euler's influence on mathematics: "Read Euler, read Euler, he is our teacher in all things," which has also been translated as "Read Portrait by Emanuel Handmann 1756(?) Euler, read Euler, he is the master of us all." [4] Born 15 April 1707 Euler was featured on the sixth series of the Swiss 10- Basel, Switzerland franc banknote and on numerous Swiss, German, and Died Russian postage stamps. The asteroid 2002 Euler was 18 September 1783 (aged 76) named in his honor. He is also commemorated by the [OS: 7 September 1783] Lutheran Church on their Calendar of Saints on 24 St. Petersburg, Russia May – he was a devout Christian (and believer in Residence Prussia, Russia biblical inerrancy) who wrote apologetics and argued Switzerland [5] forcefully against the prominent atheists of his time. -
Polhode Motion, Trapped Flux, and the GP-B Science Data Analysis
July 8, 2009 • Stanford University HEPL Seminar Polhode Motion, Trapped Flux, and the GP-B Science Data Analysis Alex Silbergleit, John Conklin and the Polhode/Trapped Flux Mapping Task Team July 8, 2009 • Stanford University HEPL Seminar Outline 1. Gyro Polhode Motion, Trapped Flux, and GP-B Readout (4 charts) 2. Changing Polhode Period and Path: Energy Dissipation (4 charts) 3. Trapped Flux Mapping (TFM): Concept, Products, Importance (7 charts) 4. TFM: How It Is Done - 3 Levels of Analysis (11 charts) A. Polhode phase & angle B. Spin phase C. Magnetic potential 5. TFM: Results ( 9 charts) 6. Conclusion. Future Work (1 chart) 2 July 8, 2009 • Stanford University HEPL Seminar Outline 1. Gyro Polhode Motion, Trapped Flux, and GP-B Readout 2. Changing Polhode Period and Path: Energy Dissipation 3. Trapped Flux Mapping (TFM): Concept, Products, Importance 4. TFM: How It Is Done - 3 Levels of Analysis A. Polhode phase & angle B. Spin phase C. Magnetic potential 5. TFM: Results 6. Conclusion. Future Work 3 July 8, 2009 • Stanford University HEPL Seminar 1.1 Free Gyro Motion: Polhoding • Euler motion equations – In body-fixed frame: – With moments of inertia: – Asymmetry parameter: (Q=0 – symmetric rotor) • Euler solution: instant rotation axis precesses about rotor principal axis along the polhode path (angular velocity Ωp) • For GP-B gyros 4 July 8, 2009 • tanford UniversityS HEPL Seminar 1.2 Symmetric vs. Asymmetric Gyro Precession • Symmetric (II 1 = 2 , Q=0): γp= const (ω3=const, polhode path=circular cone), • =φp Ω p const = , motion -
The Gravity Probe B Test of General Relativity
Home Search Collections Journals About Contact us My IOPscience The Gravity Probe B test of general relativity This content has been downloaded from IOPscience. Please scroll down to see the full text. 2015 Class. Quantum Grav. 32 224001 (http://iopscience.iop.org/0264-9381/32/22/224001) View the table of contents for this issue, or go to the journal homepage for more Download details: IP Address: 162.247.72.27 This content was downloaded on 31/05/2016 at 09:49 Please note that terms and conditions apply. Classical and Quantum Gravity Class. Quantum Grav. 32 (2015) 224001 (29pp) doi:10.1088/0264-9381/32/22/224001 The Gravity Probe B test of general relativity C W F Everitt1, B Muhlfelder1, D B DeBra1, B W Parkinson1, J P Turneaure1, A S Silbergleit1, E B Acworth1, M Adams1, R Adler1, W J Bencze1, J E Berberian1, R J Bernier1, K A Bower1, R W Brumley1, S Buchman1, K Burns1, B Clarke1, J W Conklin1, M L Eglington1, G Green1, G Gutt1, D H Gwo1, G Hanuschak1,XHe1, M I Heifetz1, D N Hipkins1, T J Holmes1, R A Kahn1, G M Keiser1, J A Kozaczuk1, T Langenstein1,JLi1, J A Lipa1, J M Lockhart1, M Luo1, I Mandel1, F Marcelja1, J C Mester1, A Ndili1, Y Ohshima1, J Overduin1, M Salomon1, D I Santiago1, P Shestople1, V G Solomonik1, K Stahl1, M Taber1, R A Van Patten1, S Wang1, J R Wade1, P W Worden Jr1, N Bartel6, L Herman6, D E Lebach6, M Ratner6, R R Ransom6, I I Shapiro6, H Small6, B Stroozas6, R Geveden2, J H Goebel3, J Horack2, J Kolodziejczak2, A J Lyons2, J Olivier2, P Peters2, M Smith3, W Till2, L Wooten2, W Reeve4, M Anderson4, N R Bennett4, -
Moscow and St Petersburg
Creating a ‘Public’ in St Petersburg, 1703-1761 Paul Keenan School of Slavonic and East European Studies, UCL Ph.D. History 1 UMI Number: U592953 All rights reserved INFORMATION TO ALL USERS The quality of this reproduction is dependent upon the quality of the copy submitted. In the unlikely event that the author did not send a complete manuscript and there are missing pages, these will be noted. Also, if material had to be removed, a note will indicate the deletion. Dissertation Publishing UMI U592953 Published by ProQuest LLC 2013. Copyright in the Dissertation held by the Author. Microform Edition © ProQuest LLC. All rights reserved. This work is protected against unauthorized copying under Title 17, United States Code. ProQuest LLC 789 East Eisenhower Parkway P.O. Box 1346 Ann Arbor, Ml 48106-1346 Abstract The thesis deals with the creation of a ‘public’ in St Petersburg during the first half of the eighteenth century. The term ‘public’ has generated a considerable historiography dealing with its implications for the field of eighteenth-century studies, which are discussed in the introduction along with the contemporary definitions of the word. In eighteenth-century Russia, the term ‘public’ usually carried the meaning of ‘audience’, typically in reference to the theatre and other spectacles. The definition of this and other similar terms provides an important framework through which to analyse the various elements of this phenomenon. This analysis has centred on the city of St Petersburg in this period for several reasons. Firstly, it was the seat of both the Russian government and the Court around a decade after its foundation and Peter I ensured its rapid population. -
FOUR VERTEX THEOREM and ITS CONVERSE Dennis Deturck, Herman Gluck, Daniel Pomerleano, David Shea Vick
THE FOUR VERTEX THEOREM AND ITS CONVERSE Dennis DeTurck, Herman Gluck, Daniel Pomerleano, David Shea Vick Dedicated to the memory of Björn Dahlberg Abstract The Four Vertex Theorem, one of the earliest results in global differential geometry, says that a simple closed curve in the plane, other than a circle, must have at least four "vertices", that is, at least four points where the curvature has a local maximum or local minimum. In 1909 Syamadas Mukhopadhyaya proved this for strictly convex curves in the plane, and in 1912 Adolf Kneser proved it for all simple closed curves in the plane, not just the strictly convex ones. The Converse to the Four Vertex Theorem says that any continuous real- valued function on the circle which has at least two local maxima and two local minima is the curvature function of a simple closed curve in the plane. In 1971 Herman Gluck proved this for strictly positive preassigned curvature, and in 1997 Björn Dahlberg proved the full converse, without the restriction that the curvature be strictly positive. Publication was delayed by Dahlberg's untimely death in January 1998, but his paper was edited afterwards by Vilhelm Adolfsson and Peter Kumlin, and finally appeared in 2005. The work of Dahlberg completes the almost hundred-year-long thread of ideas begun by Mukhopadhyaya, and we take this opportunity to provide a self-contained exposition. August, 2006 1 I. Why is the Four Vertex Theorem true? 1. A simple construction. A counter-example would be a simple closed curve in the plane whose curvature is nonconstant, has one minimum and one maximum, and is weakly monotonic on the two arcs between them. -
Effects of Energy Dissipation on the Free Body Motions of Spacecraft
. * , NATIONAL AERONAUTICS AND SPACE ADMINISTRATION 4 Technical Report No. 32-860 Effects of Energy Dissipation on the Free Body Motions of Spacecraft Peter W. Likins N66 30123 (ACCESSION NUMBER1 (THRUI .I ' IPAdESI E/// INASh CR OR TMX ORADNUMBER1 \ . GPO PRICE $ I I 1 'I ' CFSTI PRICE(S) $ , < Hard c2py (HC) ?/ fs-i') l f e 7c Microfiche (MF) I / \ ff 653 July 65 JETI PROPULSION LABORATORY CALIFORNIAINSTITUTE OF TECHNOLOGY PASAD ENA. CALIFOR N I A July 1, 1966 _- NATIONAL AERONAUTICS AND SPACE ADMINISTRATION Technical Report No. 32-860 Effects of Energy Dissipation on the Free Body Motions of Spacecraft Peter W. Likins Spacecraff Control Section JET PROPULSION LABORATORY CALIFORNIA INSTITUTE OF TECHNOLOGY PASADENA,CALIFORNIA July 1, 1966 i Copyright @ 1966 Jet Propulsion Laboratory California Institute of Technology Prepared Under Contract No. NAS 7-100 National Aeronautics & Space Administration JPL TECHNICAL REPORT NO. 32-860 CONTENTS 1. Introduction to the Problem ............... 1 II. Preliminary Considerations ............... 2 A . Definitions .................... 2 B . Rigid Body Rotational Motion and Stability ......... 3 C . Attitude Stability of Nonrigid Bodies ........... 3 D . The Space Environment ................ 4 111. Alternative Methods of Solution ............. 5 A . The Energy Sink Model Method ............. 5 B . The Discrete Parameter Model Method .......... 5 C . The Modal Model Method ............... 5 IV. The Energy Sink Model ................ 8 A . Poinsot Motion Modified for Energy Dissipation ....... 8 B . The Acceleration of a Particle Attached to a Free Rigid Body ... 13 C . Application to SYNCOM ...............15 D . Application to Explorer Z ............... 16 E . Applications with Structural Damping ........... 18 F . Applications with Annular Dampers ............20 G . Applications with Pendulum Dampers ...........20 H . -
Or Catherine Ii's Petersburg
“OUT OF THE FORMER DUCK’S NEST”, OR CATHERINE II’S PETERSBURG At the beginning of Catherine II’s reign, St. Petersburg was a bustling, growing city that was developing quickly and becoming even more beautiful. The events of the palace coup on June 28 1762, leading to Catherine’s ascension to the throne cheered on by people in Nevsky Avenue, gave Petersburg a fresh start for further development. Its population was growing steadily so that by the end of the 18th century Petersburg surpassed Moscow itself in population – more than 200,000 people lived there. But it was not the abundant population that made Catherine’s Peters burg remarkable. The city’s fate was predestined by a number of important factors. To begin with, under Catherine, the city became one of the world’s political centres. International affairs that in fluenced the general situation in Europe were settled in Petersburg. Petersburg was not only the largest, most northern port city, but also the residence of a great ruler who gloriously reigned over her immense empire for more than three decades. Under her, Russia’s political, economic and mili tary powers reached their prime and were striking for the contemporaries. Joseph II, the Emperor of Austria, wrote once that Catherine was able to fix arbitrarily the rouble’s exchange rate, and if she would take a fancy to introduce leather money, this would also be accepted, – so miraculously rich was Russia. None of the European courts could compete in splendour with Petersburg. Its expendi tures under Catherine were unthinkable for all other monarchies. -
ST. Petersburg
Hotels Restaurants Cafés Nightlife Sightseeing Events Maps ST. pETERSbuRg June - July 2013 parks and palaces Visit the former homes of the Tsars White Nights Rooftop terraces and summer festivals 16+ June - July 2013 No89 st_petersburg.inyourpocket.com CONTENTS 3 Restaurants 25 Russian, Italian, rooftop terraces and more ESSENTIAL CITY GUIDES Nightlife 38 Bars, pubs and clubs – how to stay out till 6 am Contents Sightseeing Foreword 4 The essentials 42 A word from our editor Hermitage 43 News 5 Shopping 48 What’s new in the city What to buy and where Basics and Language 6 Expat and Lifestyle 51 Some useful information Expat Experience, Religious Services and more Culture and Events 8 Getting around Ballet, opera, concerts and exhibitions Transport, tickets and more 53 Maps 54 Features St. Petersburg’s Historical Outskirts 15 Russia 58 Islands: Krestovsky and Yelagin 20 Moscow 59 Veliky Novgorod and Staraya Russa 61 Hotels 21 Kazan 64 A fine selection of places to spend the night Nizhny Novgorod 66 st_petersburg.inyourpocket.com June - July 2013 4 FOREWORD NEWS 5 It’s official now. Summer is here. After the ridiculously long winter we can now finally enjoy the famous white nights and Europe In Your Pocket Russia Day Summer in New Holland the magical midnight sun. We can attend amazing theatre The youngest of Russia’s many public holidays, Russia Day programmes and open-air festivals and go on boat tours is celebrated on the 12th of June. Originally it marked the around the canals and have cocktails on the city’s best Northern adoption of the new Russian constitution during the breaking rooftop terraces.