Mathematical Concepts Within the Artwork of Lewitt and Escher
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Additive Non-Approximability of Chromatic Number in Proper Minor
Additive non-approximability of chromatic number in proper minor-closed classes Zdenˇek Dvoˇr´ak∗ Ken-ichi Kawarabayashi† Abstract Robin Thomas asked whether for every proper minor-closed class , there exists a polynomial-time algorithm approximating the chro- G matic number of graphs from up to a constant additive error inde- G pendent on the class . We show this is not the case: unless P = NP, G for every integer k 1, there is no polynomial-time algorithm to color ≥ a K -minor-free graph G using at most χ(G)+ k 1 colors. More 4k+1 − generally, for every k 1 and 1 β 4/3, there is no polynomial- ≥ ≤ ≤ time algorithm to color a K4k+1-minor-free graph G using less than βχ(G)+(4 3β)k colors. As far as we know, this is the first non-trivial − non-approximability result regarding the chromatic number in proper minor-closed classes. We also give somewhat weaker non-approximability bound for K4k+1- minor-free graphs with no cliques of size 4. On the positive side, we present additive approximation algorithm whose error depends on the apex number of the forbidden minor, and an algorithm with addi- tive error 6 under the additional assumption that the graph has no 4-cycles. arXiv:1707.03888v1 [cs.DM] 12 Jul 2017 The problem of determining the chromatic number, or even of just de- ciding whether a graph is colorable using a fixed number c 3 of colors, is NP-complete [7], and thus it cannot be solved in polynomial≥ time un- less P = NP. -
An Artistic and Mathematical Look at the Work of Maurits Cornelis Escher
University of Northern Iowa UNI ScholarWorks Honors Program Theses Honors Program 2016 Tessellations: An artistic and mathematical look at the work of Maurits Cornelis Escher Emily E. Bachmeier University of Northern Iowa Let us know how access to this document benefits ouy Copyright ©2016 Emily E. Bachmeier Follow this and additional works at: https://scholarworks.uni.edu/hpt Part of the Harmonic Analysis and Representation Commons Recommended Citation Bachmeier, Emily E., "Tessellations: An artistic and mathematical look at the work of Maurits Cornelis Escher" (2016). Honors Program Theses. 204. https://scholarworks.uni.edu/hpt/204 This Open Access Honors Program Thesis is brought to you for free and open access by the Honors Program at UNI ScholarWorks. It has been accepted for inclusion in Honors Program Theses by an authorized administrator of UNI ScholarWorks. For more information, please contact [email protected]. Running head: TESSELLATIONS: THE WORK OF MAURITS CORNELIS ESCHER TESSELLATIONS: AN ARTISTIC AND MATHEMATICAL LOOK AT THE WORK OF MAURITS CORNELIS ESCHER A Thesis Submitted in Partial Fulfillment of the Requirements for the Designation University Honors Emily E. Bachmeier University of Northern Iowa May 2016 TESSELLATIONS : THE WORK OF MAURITS CORNELIS ESCHER This Study by: Emily Bachmeier Entitled: Tessellations: An Artistic and Mathematical Look at the Work of Maurits Cornelis Escher has been approved as meeting the thesis or project requirements for the Designation University Honors. ___________ ______________________________________________________________ Date Dr. Catherine Miller, Honors Thesis Advisor, Math Department ___________ ______________________________________________________________ Date Dr. Jessica Moon, Director, University Honors Program TESSELLATIONS : THE WORK OF MAURITS CORNELIS ESCHER 1 Introduction I first became interested in tessellations when my fifth grade mathematics teacher placed multiple shapes that would tessellate at the front of the room and we were allowed to pick one to use to create a tessellation. -
An Update on the Four-Color Theorem Robin Thomas
thomas.qxp 6/11/98 4:10 PM Page 848 An Update on the Four-Color Theorem Robin Thomas very planar map of connected countries the five-color theorem (Theorem 2 below) and can be colored using four colors in such discovered what became known as Kempe chains, a way that countries with a common and Tait found an equivalent formulation of the boundary segment (not just a point) re- Four-Color Theorem in terms of edge 3-coloring, ceive different colors. It is amazing that stated here as Theorem 3. Esuch a simply stated result resisted proof for one The next major contribution came in 1913 from and a quarter centuries, and even today it is not G. D. Birkhoff, whose work allowed Franklin to yet fully understood. In this article I concentrate prove in 1922 that the four-color conjecture is on recent developments: equivalent formulations, true for maps with at most twenty-five regions. The a new proof, and progress on some generalizations. same method was used by other mathematicians to make progress on the four-color problem. Im- Brief History portant here is the work by Heesch, who developed The Four-Color Problem dates back to 1852 when the two main ingredients needed for the ultimate Francis Guthrie, while trying to color the map of proof—“reducibility” and “discharging”. While the the counties of England, noticed that four colors concept of reducibility was studied by other re- sufficed. He asked his brother Frederick if it was searchers as well, the idea of discharging, crucial true that any map can be colored using four col- for the unavoidability part of the proof, is due to ors in such a way that adjacent regions (i.e., those Heesch, and he also conjectured that a suitable de- sharing a common boundary segment, not just a velopment of this method would solve the Four- point) receive different colors. -
The Creative Act in the Dialogue Between Art and Mathematics
mathematics Article The Creative Act in the Dialogue between Art and Mathematics Andrés F. Arias-Alfonso 1,* and Camilo A. Franco 2,* 1 Facultad de Ciencias Sociales y Humanas, Universidad de Manizales, Manizales 170003, Colombia 2 Grupo de Investigación en Fenómenos de Superficie—Michael Polanyi, Departamento de Procesos y Energía, Facultad de Minas, Universidad Nacional de Colombia, Sede Medellín, Medellín 050034, Colombia * Correspondence: [email protected] (A.F.A.-A.); [email protected] (C.A.F.) Abstract: This study was developed during 2018 and 2019, with 10th- and 11th-grade students from the Jose Maria Obando High School (Fredonia, Antioquia, Colombia) as the target population. Here, the “art as a method” was proposed, in which, after a diagnostic, three moments were developed to establish a dialogue between art and mathematics. The moments include Moment 1: introduction to art and mathematics as ways of doing art, Moment 2: collective experimentation, and Moment 3: re-signification of education as a model of experience. The methodology was derived from different mathematical-based theories, such as pendulum motion, centrifugal force, solar energy, and Chladni plates, allowing for the exploration of possibilities to new paths of knowledge from proposing the creative act. Likewise, the possibility of generating a broad vision of reality arose from the creative act, where understanding was reached from logical-emotional perspectives beyond the rational vision of science and its descriptions. Keywords: art; art as method; creative act; mathematics 1. Introduction Citation: Arias-Alfonso, A.F.; Franco, C.A. The Creative Act in the Dialogue There has always been a conception in the collective imagination concerning the between Art and Mathematics. -
Mathematics K Through 6
Building fun and creativity into standards-based learning Mathematics K through 6 Ron De Long, M.Ed. Janet B. McCracken, M.Ed. Elizabeth Willett, M.Ed. © 2007 Crayola, LLC Easton, PA 18044-0431 Acknowledgements Table of Contents This guide and the entire Crayola® Dream-Makers® series would not be possible without the expertise and tireless efforts Crayola Dream-Makers: Catalyst for Creativity! ....... 4 of Ron De Long, Jan McCracken, and Elizabeth Willett. Your passion for children, the arts, and creativity are inspiring. Thank you. Special thanks also to Alison Panik for her content-area expertise, writing, research, and curriculum develop- Lessons ment of this guide. Garden of Colorful Counting ....................................... 6 Set representation Crayola also gratefully acknowledges the teachers and students who tested the lessons in this guide: In the Face of Symmetry .............................................. 10 Analysis of symmetry Barbi Bailey-Smith, Little River Elementary School, Durham, NC Gee’s-o-metric Wisdom ................................................ 14 Geometric modeling Rob Bartoch, Sandy Plains Elementary School, Baltimore, MD Patterns of Love Beads ................................................. 18 Algebraic patterns Susan Bivona, Mount Prospect Elementary School, Basking Ridge, NJ A Bountiful Table—Fair-Share Fractions ...................... 22 Fractions Jennifer Braun, Oak Street Elementary School, Basking Ridge, NJ Barbara Calvo, Ocean Township Elementary School, Oakhurst, NJ Whimsical Charting and -
Muse® Teacher Guide: January 2020
Muse® Teacher Guide: September 2020 What Is Perfection? It may be a relief to discover that being “imperfect” has some advantages. This issue of MUSE explores how variation and diversity contribute to excellence. In a world where we are compelled to strive for excellence, the articles in this guide examine why the journey, rather than the destination, should be our primary focus. CONVERSATION QUESTION When can imperfection be extraordinary? TEACHING OBJECTIVES • Students will learn about the use of the golden In addition to supplemental materials ratio in art. • Students will learn why game developers avoid focused on core STEM skills, this perfection. flexible teaching tool offers • Students will learn how variations in biology can be the key to excellence. vocabulary-building activities, • Students will investigate number patterns utilizing questions for discussion, and cross- the Fibonacci sequence. • Students will compare and contrast the elements curricular activities. of a wide game with the elements of a deep game. • Students will examine the structure and function SELECTIONS of variations in the human body that contribute to • The Art of the Golden Ratio the extraordinary functioning. Expository Nonfiction, ~900L • Students will research examples of the golden • Good Gaming ratio in art history. Expository Nonfiction, ~1100L • Students will use mathematical concepts to express game preferences. • Perfectly Imperfect • Students will study additional examples of Expository Nonfiction, ~700L adaptation in the animal kingdom. U33T http://www.cricketmedia.com/classroom/Muse-magazine Muse® Teacher Guide: September 2020 The Art of the Golden Ratio ENGAGE pp. 20–22, Expository Nonfiction Conversation Question: When can imperfection be extraordinary? This article explores the use of mathematical concepts in art. -
The 150 Year Journey of the Four Color Theorem
The 150 Year Journey of the Four Color Theorem A Senior Thesis in Mathematics by Ruth Davidson Advised by Sara Billey University of Washington, Seattle Figure 1: Coloring a Planar Graph; A Dual Superimposed I. Introduction The Four Color Theorem (4CT) was stated as a conjecture by Francis Guthrie in 1852, who was then a student of Augustus De Morgan [3]. Originally the question was posed in terms of coloring the regions of a map: the conjecture stated that if a map was divided into regions, then four colors were sufficient to color all the regions of the map such that no two regions that shared a boundary were given the same color. For example, in Figure 1, the adjacent regions of the shape are colored in different shades of gray. The search for a proof of the 4CT was a primary driving force in the development of a branch of mathematics we now know as graph theory. Not until 1977 was a correct proof of the Four Color Theorem (4CT) published by Kenneth Appel and Wolfgang Haken [1]. Moreover, this proof was made possible by the incremental efforts of many mathematicians that built on the work of those who came before. This paper presents an overview of the history of the search for this proof, and examines in detail another beautiful proof of the 4CT published in 1997 by Neil Robertson, Daniel 1 Figure 2: The Planar Graph K4 Sanders, Paul Seymour, and Robin Thomas [18] that refined the techniques used in the original proof. In order to understand the form in which the 4CT was finally proved, it is necessary to under- stand proper vertex colorings of a graph and the idea of a planar graph. -
BOOK S in Brief
OPINION NATURE|Vol 464|15 April 2010 O To what extent UDI Creating wetlands around ST are we in control Manhattan could protect the AND of our actions? city from rising waters. L E/D Not as much as C we think, says neuroscientist OFFI H RC EA Eliezer Sternberg S in My Brain RE E R Made Me Do U CT E It (Prometheus Books, 2010). T Exploring thorny issues of moral HI responsibility in the light of recent ARC developments in neuroscience, Sternberg asks how the brain operates when we exercise our will, whether future criminals might be spotted from their brain chemistry and how consciousness might have evolved. Artificial reefs to buffer New York The Little Book Rising Currents: Projects for New York’s by the Brooklyn-based Bergen Street Knitters. of String Theory Waterfront A dredged-up oyster shell sits beside (Princeton Univ. Museum of Modern Art, New York Matthew Baird Architects’ model of ‘Working Press, 2010) Until 11 October 2010 Waterline’, a scheme for the low-lying lands by theoretical of Bayonne, New Jersey, and the Kill van Kull, physicist Steven the tidal strait that separates them from Staten Gubser puts Within the next 40 years, projected sea-level Island. The company proposes creating an arti- into words the rises of up to a third of a metre threaten coastal ficial reef and breakwater by sinking thousands abstract maths cities, including New York. By 2100, rising sea of 75-centimetre-high recycled-glass ‘jacks’ of some of the most challenging levels could inundate 21% of Lower Manhattan (shaped as in the game) into the sea bed. -
Mathematics and the Roots of Postmodern Thought This Page Intentionally Left Blank Mathematics and the Roots of Postmodern Thought
Mathematics and the Roots of Postmodern Thought This page intentionally left blank Mathematics and the Roots of Postmodern Thought Vladimir Tasic OXFORD UNIVERSITY PRESS 2001 OXTORD UNIVERSITY PRESS Oxford New York Athens Auckland Bangkok Bogota Buenos Aires Cape Town Chennai Dar es Salaam Delhi Florence Hong Kong Istanbul Karachi Kolkata Kuala Lumpur Madrid Melbourne Mexico City Mumbai Nairobi Paris Sao Paulo Shanghai Singapore Taipei Tokyo Toronto Warsaw and associated companies in Berlin Ibadan Copyright © 2001 by Oxford University Press, Inc. Published by Oxford University Press, Inc. 198 Madison Avenue. New York, New York 10016 Oxford is a registered trademark of Oxford University Press All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior permission of Oxford University Press. Library of Congress Cataloging-in-Publication Data Tasic, Vladimir, 1965- Mathematics and the roots of postmodern thought / Vladimir Tasic. p. cm. Includes bibliographical references and index. ISBN 0-19-513967-4 1. Mathematics—Philosophy. 2. Postmodernism. I. Title. QA8.4.T35 2001 510M—dc21 2001021846 987654321 Printed in the United States of America on acid-free paper For Maja This page intentionally left blank ACKNOWLEDGMENTS As much as I would like to share the responsibility for my oversimplifications, misreadings or misinterpretations with all the people and texts that have in- fluenced my thinking, I must bear that burden alone. For valuable discussions and critiques, I am indebted to Hart Caplan, Gre- gory Chaitin, Sinisa Crvenkovic, Guillermo Martinez, Lianne McTavish, Maja Padrov, Shauna Pomerantz, Goran Stanivukovic, Marija and Milos Tasic, Jon Thompson, and Steven Turner. -
The Four Color Theorem
Western Washington University Western CEDAR WWU Honors Program Senior Projects WWU Graduate and Undergraduate Scholarship Spring 2012 The Four Color Theorem Patrick Turner Western Washington University Follow this and additional works at: https://cedar.wwu.edu/wwu_honors Part of the Computer Sciences Commons, and the Mathematics Commons Recommended Citation Turner, Patrick, "The Four Color Theorem" (2012). WWU Honors Program Senior Projects. 299. https://cedar.wwu.edu/wwu_honors/299 This Project is brought to you for free and open access by the WWU Graduate and Undergraduate Scholarship at Western CEDAR. It has been accepted for inclusion in WWU Honors Program Senior Projects by an authorized administrator of Western CEDAR. For more information, please contact [email protected]. Western WASHINGTON UNIVERSITY ^ Honors Program HONORS THESIS In presenting this Honors paper in partial requirements for a bachelor’s degree at Western Washington University, I agree that the Library shall make its copies freely available for inspection. I further agree that extensive copying of this thesis is allowable only for scholarly purposes. It is understood that anv publication of this thesis for commercial purposes or for financial gain shall not be allowed without mv written permission. Signature Active Minds Changing Lives Senior Project Patrick Turner The Four Color Theorem The history of mathematics is pervaded by problems which can be stated simply, but are difficult and in some cases impossible to prove. The pursuit of solutions to these problems has been an important catalyst in mathematics, aiding the development of many disparate fields. While Fermat’s Last theorem, which states x ” + y ” = has no integer solutions for n > 2 and x, y, 2 ^ is perhaps the most famous of these problems, the Four Color Theorem proved a challenge to some of the greatest mathematical minds from its conception 1852 until its eventual proof in 1976. -
Anamorphic Art: Print out Copies of the Drawing You’D Like to Convert to Anamorphic Art (A Primitive flower) and of the Grid You’Re Going to Draw It On
Math & Art Problem Set 9 - Group Due 4/06/11 I. Duplicating and Subdividing: The first several problems (from Lessons in Mathematics and Art, Les- son 4) don't use any ideas more sophisticated than the geometry we've used in class to develop the perspective techniques we have so far: par- allel lines, similar triangles, diagonals bisect each other, etc. However, they are not merely replicating or adapting what we've already done { for these problems, you develop new techniques. Brainstorm not only with friends in the class but also with people outside of class - all sorts of people can get caught up in these questions! Allow yourself enough time to really think about them over several days, and enjoy them! Print out several copies of the section of roadside fence. 1. Treating the given solid outline as one section of fence, draw a copy that is a duplicate of the original {with the top of its nearest fencepost occurring at the point P . (In other words, there should be a space between the two sections of fence). Explain (mathematically) why this technique works. Note: It is just a coincidence that P is close to where a diagonal through the midpoint of the side hits; P could be anywhere along the top rail. The point is that sometimes we want to draw an exact copy of a rectangle some arbitrary distance from the original. 2. Draw a duplicate of the section of fence (in the same plane as the original), this time with the top of its far fencepost at the point P . -
Mathematics and Art: a Cultural History Free
FREE MATHEMATICS AND ART: A CULTURAL HISTORY PDF Lynn Gamwell,Neil Degrasse Tyson | 576 pages | 01 Dec 2015 | Princeton University Press | 9780691165288 | English | New Jersey, United States Mathematics and Art: A Cultural History - Lynn Gamwell - Google книги Goodreads helps you keep track of books you want to read. Want to Read saving…. Want to Read Currently Reading Read. Other editions. Enlarge cover. Error rating book. Refresh and try again. Open Preview See a Problem? Details if other :. Thanks for telling Mathematics and Art: A Cultural History about the problem. Return to Book Page. Preview — Mathematics and Art by Lynn Gamwell. Get A Copy. Hardcoverpages. More Details Friend Reviews. To see what your friends thought of this book, please sign up. To ask other readers questions about Mathematics and Artplease sign up. Lists with This Book. Community Reviews. Showing Average rating 4. Rating details. More filters. Sort order. Dec 02, Brian Clegg rated it really liked it. I have to start by saying that I have never really understood the point of coffee table books. The price is fairly wallet-crunching too. Although it is heavily and beautifully illustrated, though, this is much more than just a picture book of images with a mathematical association. It is a genuinely interesting text, running ac I have to start by saying that I have never really understood the point of coffee table books. It is a genuinely interesting text, running across over pages, which I found I liked far more than I wanted to. While there is, as is often the case with this kind of attempt to link science and the arts, sometimes a rather tenuous link to the mathematics, it is still fascinating to discover how the influence of maths on culture at large has had an impact on the arts.