A Bibliography of Recreational Mathematics, Volume 3. INSTITUTION National Council of Teachers of Mathematics, Inc., Washington, D.C

Total Page:16

File Type:pdf, Size:1020Kb

A Bibliography of Recreational Mathematics, Volume 3. INSTITUTION National Council of Teachers of Mathematics, Inc., Washington, D.C DOCUMENT RESUME ED 087 631 SE 017 302 AUTHOR Schaaf, William L. TITLE A Bibliography of Recreational Mathematics, Volume 3. INSTITUTION National Council of Teachers of Mathematics, Inc., Washington, D.C. PUB DATE 73 NOTE 187p. AVAILABLE FROM National Council of Teachers of Mathematics, 1906 Association Drive, Reston, Virginia 22091 EDRS PRICE MF-$0.65 HC Not Available from EDRS. DESCRIPTORS *Annotated Bibliographies; Classroom Games; *Games; Geometric Concepts; Instructional Materials; *Literature Guides; Literature Reviews; *Mathematical Enrichment; *Mathematics Education; Number Concepts; Probability; Reference Books ABSTRACT This book is a partially annotated bibliography of books, articles and periodicals concerned with mathematical games, puzzles, tricks, amusements, and paradoxes. Because the literature in recreational mathematics has proliferated to amazing proportions since Volume 2 of this series (ED 040 874), Volume 3 is more than just an updating of the earlier monographs. The overall organization of the book has been retained, although there has been a notable rearrangement of subtopics in the interest of economy and clarity. Major changes include (1) the addition of two new sections on classroom games and recreational activities which will be quite useful for teachers; (2)a chronological synopsis of Martin Gardner's popular column in Scientific American; and (3)a glossary of terms related to recreational mathematics. The main topic headings are: Arithmetic Recreations; Number Theory as Recreation; Geometric Recreations; Topological Recreations; Magic Squares and Related Configurations; Pythagorean Recreations; Recreations in Antiquity; Combinatorial Recreations; Manipulative Recreations; and Mathematics in Related Fields. (JP) U 5 DEPARTMENT OF HEALTH, EDUCATION & WELFARE NATIONAL INSTITUTE OF EDUCATION THIS DOCUMENT HAS BEEN REPRO DUCED EXACTLY AS RECEIVED FROM THE PERSON OR ORGANIZATION ORIGIN ATING IT POINTS OF VIEW OR OPINIONS STATED DO NOT NECESSARILY REPRE SENT OFFICIAL NATIONAL INSTITUTE OF EDUCATION POSITION OR POLICY ; A BIBLIOGRAPHY OF recreational mathematics volume 3 A BIBLIOGRAPHY OF recreational mathematics VOLUME 3 William L. Schaaf Professor Emeritus Brooklyn College The City University of New York NATIONAL COUNCIL OF TEACHERS OF MATHEMATICS 1906 Association Drive, Reston, Virginia 22091 "PERMISSION 10 REPRODUCE THIS COPYRIGHTED MATERIAL BY MICRO. FICHE ONLY HAS BEEN GRANTED BY TO ERIC AND ORGANIZATIONS OPERAT INC UNDER AGREEMENTS WITH.THE NA TIONAL INSTITUTE OF EDUCATION FURTHER REPRODUCTION OUTSIDE THE ERIC SYSTEM REQUIRES PERMIS SION DF THE COPYRIGHT OWNER Copyright 1973 by the National Council of Teachers of Mathematics, Inc. All rights reserved. Library of Congress Cataloging in Publication Data (Revised): Schaaf, William Leonard, 1898 A bibliography of recreational mathematics. Vols. 2 and 3 lack edition statement. First3d editions published under title: Recrea- tional mathematics. 1.Mathematical recreationsBibliography. I.Title. Z6654.M3S32 016.7937'4 73.12168 Printed in the United States of America Preface Since the appearance of volume 2 in 1970, general interest in mathematical recreations has not abated. On the contrary, not only has the literature be- come more sophisticated,it has proliferated to amazing proportions.As Maxey Brooke suggests, it is like.Alice: You have to keep running as hard as you can to stay in the same plaCe. "Thus the present volume is morc than just an updating of the earlier monographs. For the reader's convenience, the overall organization of the book has been retained, although there has been a notable rearrangement of subtopics in the interest of economy and greater clarity. Major changes include (1) the addi- tion of two new sections on classroom games and recreational activities, which will doubtless appeal to teachers;(2)a chronological synopsis of Martin Gardner's popular column in Scientific American; and (3) a glossary of terms related to recreational mathematics. As heretofore, some references have been listed under two different head- ings. Also, several hundred entries that were somehow previously overlooked have been belatedly included. Finally, a few items listed in the earlier vol- umes have been deliberately repeated here to enable the reader to retrieve related information concerning a given topic. To acknowledge my indebtedness to many friends and correspondents would entail a lengthy list of names, and so I hereby express my gratitude to them all. My thanks are especially due to Maxey Brooke, Mannis Charosh, Martin Gardner, James A. H. Hunter, and Charles W. Trigg, whose help and sugges- tions have been invaluable. My thanks are also extended to the National Council of Teachers of Mathematics for its customary cooperation, and to my wife for her unflagging encouragement and patience. William L. Schaaf Boca Raton, Florida April 1973 Contents Chapter 1.Arithmetical Recreations 1 1.1Calendar Problems 1 1.2Cryptarithms; Alphametics; Anagrams 1 1.3Determinants 3 1.4Fallacies; Illegal Operations; Paradoxes 3 1.5Four Fours; Four Digits; Related Problems 4 1.6Fractions; Farey Sequences 5 1.7Number Bases; Numeration 5 1.8Number Mysticism; Numerology 7 1.9Number Pleasantries; Digital Oddities 8 1.10 Number Tricks; Calculating Prodigies 11 1.11 Repeating Decimals 12 1.12 Story Problems 13 Chapter 2. Number Theory as Recreation 16 2.1Amicable Numbers 16 2.2Divisibility 17 2.3Fibonacci and Lucas Numbers 18 2.4Figurate Numbers 19 2.5Palindromes; Repunits and Repdigits 21 2.6Perfect, Deficient, and Abundant Numbers 22 2.7Prime Numbers 24 2.8Recursive Operations; Bracelets; Digital Inversions 26 2.9General Theory of Numbers 27 Chapter 3. Geometric Recreations 30 3.1Curves: Their Properties and Construction 30 3.2Curves of Constant Width 32 3.3The Fourth Dimension 32 3.4Geometric Constructions; Mascheroni Constructions 33 vii Viii CONTENTS 3.5Geometric Problems and Theorems 34 3.6Geometric Recreations and Puzzles 35 3.7Lattices; Taxicab Geometry; Geoboard 37 3.8Optical Illusions 38 Chapter 4. Topological Recreations 39 4.1Braids; Knots; Flexagons; Mobius Bands; String Figures 39 4.2Dissection Problems 39 4.3Graphs; Networks 41 4.4Mai) Coloring 43 4.5Mazes and Labyrinths 46 4.6Paper Folding; Origami 46- 4.7Polyhedrons; Platonic and Archimedean Solids 48 4.8Polytopes; Irregular Polyhedrons 50 4.9Polyominoes; Polyiamonds; Rep-tiles 51 4.10 Soma Cubes; Polycubes 52 4.11 Squared Rectangles; Squaring the Square 53 4.12 Tangrams 53 4.13 Tessellations; Packing Problems 53 4.14 Topological Amusements 56 Chapter 5. Magic Squares and Related Configurations... 57 5.1Magic Squares 57 5.2The Magic Knight's Tour 59 5.3Antimagic Squares; Heterosquares 60 5.4Magic Triangles and Other Plane Figures 60 5.5Magic and Antimagic Solids 60 5.6Latin Squares and Euler Squares 61 Chapter 6. Pythagorean Recreations 62 6.1The Pythagorean Theorem 62 6.2Pythagorean Triples 63 6.3Pythagorean Relationships 64 6.4Heronic Triangles; Figures with Integer Dimensions 65 Chapter 7. Recreations in Antiquity 67 7.1Computation of Pi (7r) 67 7.2History of Pi; e, 7r, and i 67 7.3Pi and Probability 68 7.4Trisection of an Angle 68 CONTENTS iX Chapter 8. Combinatorial Recreations 70 8.1 Permutations, Combinations, and Partitions; Factorials 70 8.2Pascal's Triangle 73 8.3Probability: Problems and Theory 73 8.4Games of Chance; Gaint."-; 75 Chapter 9. Manipulative Recreations 77 9.1Ticktacktoe 77 9.2The Fifteen Puzzle 77 9.3Binary Recreations; Nim; Wythoff's Game 77 9.4Board Games 78 9.5. Pencil and Paper Games. 79 9.6Manipulative Puzzles and Recreations 80 9.7Card Games; Card Tricks 82 9.8Colored Squares; Tiles and Cubes 83 9.9Games and Game Strategy 84 9.10 Domino Recreations 85 9.11 Chess Recreations 86 Chapter 10.Miscellaneous Recreations 88 10.1 Logic; Inferential Problems; Logical Paradoxes; Infinity 88 10.2 Cryptography; Cryptanalysis; Codes and Ciphers 89 10.3 Humor and Mathematics 90 10.4 Sports and Mathematics 92 10.5 Philately and Mathematics 92 10.6 Assorted Diversions and Amusements 92 Chapter 11.Mathematics in Related Fields 95 11.1 Ornament and Design; Art and Architecture 95 11.2 Dynamic Symmetry; Golden Section 96 11.3 Music and Mathematics 97 11.4 Music and Computers 98 11.5 Mathematics in Nature 99 Chapter 12.Recreations in the Classroom 100 12.1 Elementary School Activities 100 12.2 Secondary School Activities 104 12.3 Mathematics Clubs, Plays, Programs, Projects 108 12.4 Mathematics Contests, Competitions, Leagues 109 cONTENTS , Appendix A.Contemporary Works on Mathematical Recreations 111 Appendix B.Chronological Synopsis of Martin Gardner's Column in Scientific American 114 Glossary. A List of Terms Related to Recreational Mathematics 119 Problems Problems worthy of attack prove their worth by hitting back. PIET HEIN Grooks 1, p. 2 (1966). Last Things First Solutions to problems are easy to find: the problem's a great contribution. What is truly an art is to wring from your mind a problem to fit a solution. PIET HEIN Grooks 3, p. 15 (1970) Reprinted by permission of the Piet Hein International Information Center. 0 Aspila 1970, all rights reserved. Principal Abbreviations Used A.iW.i't. =American Mathematical Monthly A.T. ,arithmetic Teacher Fib.Q. = Fibonacci Quarterly J.R.M. = I ournal o f Recreational Mathematics M.Gaz. = Mathematical Gazette M.Mag. = Mathematics Magazine M.S.J. = Mathematics Student Journal M.T. = Mathematics Teacher M.Tchg. = Mathematics Teaching (England) NCTM = National Council of Teachers of Mathematics N.M.M. = National Mathematics Magazine P.M.E.J. = Pi Mu Epsilon Journal R.M.M. = Recreational Mathematics Magazine Sci.Am. = Scientific American Sci.Mo. = Scientific Monthly S.S.M. = School Science and Mathematics Scrip.M. = Scripta Mathematica Chapter 1 /11eastereetat Rematioaa 1.1 Calendar Problems Austin, A. K. A perpetual calendar. M.Tchg., no. 56, p. 18; Autumn 1971. Feser, Victor G. Annual sums. J.R.M. 5:252; Oct. 1972. Product dates. J.R.M. 5:251-52; Oct. 1972. Fredregill, Ernest J. 1000 Years: A Julian/Gregorian Perpetual Calendar. New York: Exposition Press. 1970. 38 pp. Brief history of calendars and methods of construction. Gardner, Martin. Birthday paradox. Sci.Am. Apr. 1957, p. 166. Calendar problems. Sci.Am., May 1967; Apr.
Recommended publications
  • Section 1.7B the Four-Vertex Theorem
    Section 1.7B The Four-Vertex Theorem Matthew Hendrix Matthew Hendrix Section 1.7B The Four-Vertex Theorem Definition The integer I is called the rotation index of the curve α where I is an integer multiple of 2π; that is, Z 1 k(s) dt = θ(`) − θ(0) = 2πI 0 Definition 2 Let α : [0; `] ! R be a plane closed curve given by α(s) = (x(s); y(s)). Since s is the arc length, the tangent vector t(s) = (x0(s); y 0(s)) has unit length. The tangent indicatrix is 2 0 0 t : [0; `] ! R , which is given by t(s) = (x (s); y (s)); this is a differentiable curve, the trace of which is contained in the circle of radius 1. Matthew Hendrix Section 1.7B The Four-Vertex Theorem Definition 2 Let α : [0; `] ! R be a plane closed curve given by α(s) = (x(s); y(s)). Since s is the arc length, the tangent vector t(s) = (x0(s); y 0(s)) has unit length. The tangent indicatrix is 2 0 0 t : [0; `] ! R , which is given by t(s) = (x (s); y (s)); this is a differentiable curve, the trace of which is contained in the circle of radius 1. Definition The integer I is called the rotation index of the curve α where I is an integer multiple of 2π; that is, Z 1 k(s) dt = θ(`) − θ(0) = 2πI 0 Matthew Hendrix Section 1.7B The Four-Vertex Theorem Definition 2 A vertex of a regular plane curve α :[a; b] ! R is a point t 2 [a; b] where k0(t) = 0.
    [Show full text]
  • A Tour of Fermat's World
    ATOUR OF FERMAT’S WORLD Ching-Li Chai Samples of numbers More samples in arithemetic ATOUR OF FERMAT’S WORLD Congruent numbers Fermat’s infinite descent Counting solutions Ching-Li Chai Zeta functions and their special values Department of Mathematics Modular forms and University of Pennsylvania L-functions Elliptic curves, complex multiplication and Philadelphia, March, 2016 L-functions Weil conjecture and equidistribution ATOUR OF Outline FERMAT’S WORLD Ching-Li Chai 1 Samples of numbers Samples of numbers More samples in 2 More samples in arithemetic arithemetic Congruent numbers Fermat’s infinite 3 Congruent numbers descent Counting solutions 4 Fermat’s infinite descent Zeta functions and their special values 5 Counting solutions Modular forms and L-functions Elliptic curves, 6 Zeta functions and their special values complex multiplication and 7 Modular forms and L-functions L-functions Weil conjecture and equidistribution 8 Elliptic curves, complex multiplication and L-functions 9 Weil conjecture and equidistribution ATOUR OF Some familiar whole numbers FERMAT’S WORLD Ching-Li Chai Samples of numbers More samples in §1. Examples of numbers arithemetic Congruent numbers Fermat’s infinite 2, the only even prime number. descent 30, the largest positive integer m such that every positive Counting solutions Zeta functions and integer between 2 and m and relatively prime to m is a their special values prime number. Modular forms and L-functions 3 3 3 3 1729 = 12 + 1 = 10 + 9 , Elliptic curves, complex the taxi cab number. As Ramanujan remarked to Hardy, multiplication and it is the smallest positive integer which can be expressed L-functions Weil conjecture and as a sum of two positive integers in two different ways.
    [Show full text]
  • Calcium: Computing in Exact Real and Complex Fields Fredrik Johansson
    Calcium: computing in exact real and complex fields Fredrik Johansson To cite this version: Fredrik Johansson. Calcium: computing in exact real and complex fields. ISSAC ’21, Jul 2021, Virtual Event, Russia. 10.1145/3452143.3465513. hal-02986375v2 HAL Id: hal-02986375 https://hal.inria.fr/hal-02986375v2 Submitted on 15 May 2021 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. Calcium: computing in exact real and complex fields Fredrik Johansson [email protected] Inria Bordeaux and Institut Math. Bordeaux 33400 Talence, France ABSTRACT This paper presents Calcium,1 a C library for exact computa- Calcium is a C library for real and complex numbers in a form tion in R and C. Numbers are represented as elements of fields suitable for exact algebraic and symbolic computation. Numbers Q¹a1;:::; anº where the extension numbers ak are defined symbol- ically. The system constructs fields and discovers algebraic relations are represented as elements of fields Q¹a1;:::; anº where the exten- automatically, handling algebraic and transcendental number fields sion numbers ak may be algebraic or transcendental. The system combines efficient field operations with automatic discovery and in a unified way.
    [Show full text]
  • Symmetrization of Convex Plane Curves
    Symmetrization of convex plane curves P. Giblin and S. Janeczko Abstract Several point symmetrizations of a convex curve Γ are introduced and one, the affinely invariant ‘cen- tral symmetric transform’ (CST) with respect to a given basepoint inside Γ, is investigated in detail. Examples for Γ include triangles, rounded triangles, ellipses, curves defined by support functions and piecewise smooth curves. Of particular interest is the region of basepoints for which the CST is convex (this region can be empty but its complement in the interior of Γ is never empty). The (local) boundary of this region can have cusps and in principle it can be determined from a geometrical construction for the tangent direction to the CST. MR Classification 52A10, 53A04 1 Introduction There are several ways in which a convex plane curve Γ can be transformed into one which is, in some sense, symmetric. Here are three possible constructions. PT Assume that Γ is at least C1. For each pair of parallel tangents of Γ construct two parallel lines with the same separation and the origin (or any other fixed point) equidistant from them. The resulting envelope, the parallel tangent transform, will be symmetric about the chosen fixed point. All choices of fixed point give the same transform up to translation. This construction is affinely invariant. A curve of constant width, where the separation of parallel tangent pairs is constant, will always transform to a circle. Another example is given in Figure 1(a). This construction can also be interpreted in the following way: Reflect Γ in the chosen fixed point 1 to give Γ∗ say.
    [Show full text]
  • Input for Carnival of Math: Number 115, October 2014
    Input for Carnival of Math: Number 115, October 2014 I visited Singapore in 1996 and the people were very kind to me. So I though this might be a little payback for their kindness. Good Luck. David Brooks The “Mathematical Association of America” (http://maanumberaday.blogspot.com/2009/11/115.html ) notes that: 115 = 5 x 23. 115 = 23 x (2 + 3). 115 has a unique representation as a sum of three squares: 3 2 + 5 2 + 9 2 = 115. 115 is the smallest three-digit integer, abc , such that ( abc )/( a*b*c) is prime : 115/5 = 23. STS-115 was a space shuttle mission to the International Space Station flown by the space shuttle Atlantis on Sept. 9, 2006. The “Online Encyclopedia of Integer Sequences” (http://www.oeis.org) notes that 115 is a tridecagonal (or 13-gonal) number. Also, 115 is the number of rooted trees with 8 vertices (or nodes). If you do a search for 115 on the OEIS website you will find out that there are 7,041 integer sequences that contain the number 115. The website “Positive Integers” (http://www.positiveintegers.org/115) notes that 115 is a palindromic and repdigit number when written in base 22 (5522). The website “Number Gossip” (http://www.numbergossip.com) notes that: 115 is the smallest three-digit integer, abc, such that (abc)/(a*b*c) is prime. It also notes that 115 is a composite, deficient, lucky, odd odious and square-free number. The website “Numbers Aplenty” (http://www.numbersaplenty.com/115) notes that: It has 4 divisors, whose sum is σ = 144.
    [Show full text]
  • A Clasification of Known Root Prime-Generating
    Special properties of the first absolute Fermat pseudoprime, the number 561 Marius Coman Bucuresti, Romania email: [email protected] Abstract. Though is the first Carmichael number, the number 561 doesn’t have the same fame as the third absolute Fermat pseudoprime, the Hardy-Ramanujan number, 1729. I try here to repair this injustice showing few special properties of the number 561. I will just list (not in the order that I value them, because there is not such an order, I value them all equally as a result of my more or less inspired work, though they may or not “open a path”) the interesting properties that I found regarding the number 561, in relation with other Carmichael numbers, other Fermat pseudoprimes to base 2, with primes or other integers. 1. The number 2*(3 + 1)*(11 + 1)*(17 + 1) + 1, where 3, 11 and 17 are the prime factors of the number 561, is equal to 1729. On the other side, the number 2*lcm((7 + 1),(13 + 1),(19 + 1)) + 1, where 7, 13 and 19 are the prime factors of the number 1729, is equal to 561. We have so a function on the prime factors of 561 from which we obtain 1729 and a function on the prime factors of 1729 from which we obtain 561. Note: The formula N = 2*(d1 + 1)*...*(dn + 1) + 1, where d1, d2, ...,dn are the prime divisors of a Carmichael number, leads to interesting results (see the sequence A216646 in OEIS); the formula M = 2*lcm((d1 + 1),...,(dn + 1)) + 1 also leads to interesting results (see the sequence A216404 in OEIS).
    [Show full text]
  • Mathematical Circus & 'Martin Gardner
    MARTIN GARDNE MATHEMATICAL ;MATH EMATICAL ASSOCIATION J OF AMERICA MATHEMATICAL CIRCUS & 'MARTIN GARDNER THE MATHEMATICAL ASSOCIATION OF AMERICA Washington, DC 1992 MATHEMATICAL More Puzzles, Games, Paradoxes, and Other Mathematical Entertainments from Scientific American with a Preface by Donald Knuth, A Postscript, from the Author, and a new Bibliography by Mr. Gardner, Thoughts from Readers, and 105 Drawings and Published in the United States of America by The Mathematical Association of America Copyright O 1968,1969,1970,1971,1979,1981,1992by Martin Gardner. All riglhts reserved under International and Pan-American Copyright Conventions. An MAA Spectrum book This book was updated and revised from the 1981 edition published by Vantage Books, New York. Most of this book originally appeared in slightly different form in Scientific American. Library of Congress Catalog Card Number 92-060996 ISBN 0-88385-506-2 Manufactured in the United States of America For Donald E. Knuth, extraordinary mathematician, computer scientist, writer, musician, humorist, recreational math buff, and much more SPECTRUM SERIES Published by THE MATHEMATICAL ASSOCIATION OF AMERICA Committee on Publications ANDREW STERRETT, JR.,Chairman Spectrum Editorial Board ROGER HORN, Chairman SABRA ANDERSON BART BRADEN UNDERWOOD DUDLEY HUGH M. EDGAR JEANNE LADUKE LESTER H. LANGE MARY PARKER MPP.a (@ SPECTRUM Also by Martin Gardner from The Mathematical Association of America 1529 Eighteenth Street, N.W. Washington, D. C. 20036 (202) 387- 5200 Riddles of the Sphinx and Other Mathematical Puzzle Tales Mathematical Carnival Mathematical Magic Show Contents Preface xi .. Introduction Xlll 1. Optical Illusions 3 Answers on page 14 2. Matches 16 Answers on page 27 3.
    [Show full text]
  • A Primer of Analytic Number Theory: from Pythagoras to Riemann Jeffrey Stopple Index More Information
    Cambridge University Press 0521813093 - A Primer of Analytic Number Theory: From Pythagoras to Riemann Jeffrey Stopple Index More information Index #, number of elements in a set, 101 and ␨(2n), 154–157 A =, Abel summation, 202, 204, 213 and Euler-Maclaurin summation, 220 definition, 201 definition, 149 Abel’s Theorem Bernoulli, Jacob, 146, 150, 152 I, 140, 145, 201, 267, 270, 272 Bessarion, Cardinal, 282 II, 143, 145, 198, 267, 270, 272, 318 binary quadratic forms, 270 absolute convergence definition, 296 applications, 133, 134, 139, 157, 167, 194, equivalence relation ∼, 296 198, 208, 215, 227, 236, 237, 266 reduced, 302 definition, 133 Birch Swinnerton-Dyer conjecture, xi, xii, abundant numbers, 27, 29, 31, 43, 54, 60, 61, 291–294, 326 82, 177, 334, 341, 353 Black Death, 43, 127 definition, 27 Blake, William, 216 Achilles, 125 Boccaccio’s Decameron, 281 aliquot parts, 27 Boethius, 28, 29, 43, 278 aliquot sequences, 335 Bombelli, Raphael, 282 amicable pairs, 32–35, 39, 43, 335 de Bouvelles, Charles, 61 definition, 334 Bradwardine, Thomas, 43, 127 ibn Qurra’s algorithm, 33 in Book of Genesis, 33 C2, twin prime constant, 182 amplitude, 237, 253 Cambyses, Persian emperor, 5 Analytic Class Number Formula, 273, 293, Cardano, Girolamo, 25, 282 311–315 Catalan-Dickson conjecture, 336 analytic continuation, 196 Cataldi, Pietro, 30, 333 Anderson, Laurie, ix cattle problem, 261–263 Apollonius, 261, 278 Chebyshev, Pafnuty, 105, 108 Archimedes, 20, 32, 92, 125, 180, 260, 285 Chinese Remainder Theorem, 259, 266, 307, area, basic properties, 89–91, 95, 137, 138, 308, 317 198, 205, 346 Cicero, 21 Aristotle’s Metaphysics,5,127 class number, see also h arithmetical function, 39 Clay Mathematics Institute, xi ∼, asymptotic, 64 comparison test Athena, 28 infinite series, 133 St.
    [Show full text]
  • The Observability of the Fibonacci and the Lucas Cubes
    View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Elsevier - Publisher Connector Discrete Mathematics 255 (2002) 55–63 www.elsevier.com/locate/disc The observability of the Fibonacci and the Lucas cubes Ernesto DedÃo∗;1, Damiano Torri1, Norma Zagaglia Salvi1 Dipartimento di Matematica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy Received 5 April 1999; received inrevised form 31 July 2000; accepted 8 January2001 Abstract The Fibonacci cube n is the graph whose vertices are binary strings of length n without two consecutive 1’s and two vertices are adjacent when their Hamming distance is exactly 1. If the binary strings do not contain two consecutive 1’s nora1intheÿrst and in the last position, we obtainthe Lucas cube Ln. We prove that the observability of n and Ln is n, where the observability of a graph G is the minimum number of colors to be assigned to the edges of G so that the coloring is proper and the vertices are distinguished by their color sets. c 2002 Elsevier Science B.V. All rights reserved. MSC: 05C15; 05A15 Keywords: Fibonacci cube; Fibonacci number; Lucas number; Observability 1. Introduction A Fibonacci string of order n is a binary string of length n without two con- secutive ones. Let and ÿ be binary strings; then ÿ denotes the string obtained by concatenating and ÿ. More generally, if S is a set of strings, then Sÿ = {ÿ: ∈ S}. If Cn denotes the set of the Fibonacci strings of order n, then Cn+2 =0Cn+1 +10Cn and |Cn| = Fn, where Fn is the nth Fibonacci number.
    [Show full text]
  • Sequences of Primes Obtained by the Method of Concatenation
    SEQUENCES OF PRIMES OBTAINED BY THE METHOD OF CONCATENATION (COLLECTED PAPERS) Copyright 2016 by Marius Coman Education Publishing 1313 Chesapeake Avenue Columbus, Ohio 43212 USA Tel. (614) 485-0721 Peer-Reviewers: Dr. A. A. Salama, Faculty of Science, Port Said University, Egypt. Said Broumi, Univ. of Hassan II Mohammedia, Casablanca, Morocco. Pabitra Kumar Maji, Math Department, K. N. University, WB, India. S. A. Albolwi, King Abdulaziz Univ., Jeddah, Saudi Arabia. Mohamed Eisa, Dept. of Computer Science, Port Said Univ., Egypt. EAN: 9781599734668 ISBN: 978-1-59973-466-8 1 INTRODUCTION The definition of “concatenation” in mathematics is, according to Wikipedia, “the joining of two numbers by their numerals. That is, the concatenation of 69 and 420 is 69420”. Though the method of concatenation is widely considered as a part of so called “recreational mathematics”, in fact this method can often lead to very “serious” results, and even more than that, to really amazing results. This is the purpose of this book: to show that this method, unfairly neglected, can be a powerful tool in number theory. In particular, as revealed by the title, I used the method of concatenation in this book to obtain possible infinite sequences of primes. Part One of this book, “Primes in Smarandache concatenated sequences and Smarandache-Coman sequences”, contains 12 papers on various sequences of primes that are distinguished among the terms of the well known Smarandache concatenated sequences (as, for instance, the prime terms in Smarandache concatenated odd
    [Show full text]
  • On Hardy's Apology Numbers
    ON HARDY’S APOLOGY NUMBERS HENK KOPPELAAR AND PEYMAN NASEHPOUR Abstract. Twelve well known ‘Recreational’ numbers are generalized and classified in three generalized types Hardy, Dudeney, and Wells. A novel proof method to limit the search for the numbers is exemplified for each of the types. Combinatorial operators are defined to ease programming the search. 0. Introduction “Recreational Mathematics” is a broad term that covers many different areas including games, puzzles, magic, art, and more [31]. Some may have the impres- sion that topics discussed in recreational mathematics in general and recreational number theory, in particular, are only for entertainment and may not have an ap- plication in mathematics, engineering, or science. As for the mathematics, even the simplest operation in this paper, i.e. the sum of digits function, has application outside number theory in the domain of combinatorics [13, 26, 27, 28, 34] and in a seemingly unrelated mathematical knowledge domain: topology [21, 23, 15]. Pa- pers about generalizations of the sum of digits function are discussed by Stolarsky [38]. It also is a surprise to see that another topic of this paper, i.e. Armstrong numbers, has applications in “data security” [16]. In number theory, functions are usually non-continuous. This inhibits solving equations, for instance, by application of the contraction mapping principle because the latter is normally for continuous functions. Based on this argument, questions about solving number-theoretic equations ramify to the following: (1) Are there any solutions to an equation? (2) If there are any solutions to an equation, then are finitely many solutions? (3) Can all solutions be found in theory? (4) Can one in practice compute a full list of solutions? arXiv:2008.08187v1 [math.NT] 18 Aug 2020 The main purpose of this paper is to investigate these constructive (or algorith- mic) problems by the fixed points of some special functions of the form f : N N.
    [Show full text]
  • Baguenaudier - Wikipedia, the Free Encyclopedia
    Baguenaudier - Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/Baguenaudier You can support Wikipedia by making a tax-deductible donation. Baguenaudier From Wikipedia, the free encyclopedia Baguenaudier (also known as the Chinese Rings, Cardan's Suspension, or five pillars puzzle) is a mechanical puzzle featuring a double loop of string which must be disentangled from a sequence of rings on interlinked pillars. The puzzle is thought to have been invented originally in China. Stewart Culin provided that it was invented by the Chinese general Zhuge Liang in the 2nd century AD. The name "Baguenaudier", however, is French. In fact, the earliest description of the puzzle in Chinese history was written by Yang Shen, a scholar in 16th century in his Dan Qian Zong Lu (Preface to General Collections of Studies on Lead). Édouard Lucas, the inventor of the Tower of Hanoi puzzle, was known to have come up with an elegant solution which used binary and Gray codes, in the same way that his puzzle can be solved. Variations of the include The Devil's Staircase, Devil's Halo and the Impossible Staircase. Another similar puzzle is the Giant's Causeway which uses a separate pillar with an embedded ring. See also Disentanglement puzzle Towers of Hanoi External links A software solution in wiki source (http://en.wikisource.org/wiki/Baguenaudier) Eric W. Weisstein, Baguenaudier at MathWorld. The Devil's Halo listing at the Puzzle Museum (http://www.puzzlemuseum.com/month/picm05/200501d-halo.htm) David Darling - encyclopedia (http://www.daviddarling.info/encyclopedia/C/Chinese_rings.html) Retrieved from "http://en.wikipedia.org/wiki/Baguenaudier" Categories: Chinese ancient games | Mechanical puzzles | Toys | China stubs This page was last modified on 7 July 2008, at 11:50.
    [Show full text]