Donald Coxeter On John Robinson's Sculpture Firmament quadratic in x + 1/x to give x as. or approximately 1.8832. This givesthe radii previously described. donald coxeter, January 1997. http://www.bangor.ac.uk/cpm/sculmath/donald.htm
Extractions: It is known [H.S.M. Coxeter, 'Loxodromic Sequences of Tangent Spheres', , 1 (1968), pp. 112-117] that, for a sequence of circles n such that every 4 consecutive members are mutually tangent, the inversive distance n between and n (or between m and m+n for any m ) is given in terms of the Fibonacci numbers f n by the formula For the analogous sequence of spheres, such that every 5 consecutive members are mutually tangent, a prize is offered to the first person who provides the analogous formula for the inversive distances between pairs of the spheres. Meanwhile, by taking one pair of adjacent 'spheres' to be a pair of parallel planes, one easily finds that the values of cosh n are n cosh n John Robinson's sculpture FIRMAMENT is based on seven such spheres whose radii are in geometric progression; that is, the seven radii are proportional to 1/x , 1/x , 1/ x, 1, x, x , x where x is the root, between 1 and 2, of the quintic equation x - x - x - x - x + 1 = . This equation has a root and the remaining quartic is easily solvable as a quadratic in x + 1/x to give x as
Geometry / Polytopes star. HSM coxeter Biography of donald coxeter (1907) from an online Historyof Mathematics. donald coxeter Mathematician Biographical http://paloweb.com/Science/Math/Geometry/Polytopes/
CBC Radio | Quirks & Quarks | April 05, 2003 Professor donald coxeter, 19072003. Listen to an mp3 of this topic or download theOgg file. Related Links donald coxeter from Scientists.ca. Dinosaur Cannibals. http://radio.cbc.ca/programs/quirks/archives/02-03/apr05.html
Extractions: Some samples are incubated at near-body temperatures. The outbreak of Severe Acute Respiratory Syndrome [SARS] that has struck in Toronto and around the world over the past couple of weeks has been a real test for our public health system. We know neither the cause, the origin or the ultimate danger that may result from this mysterious illness. Dr. Amin Kabani is Chief of Bacteriology at the National Microbiology Laboratory and an associate professor of Microbiology and Pathology at the University of Manitoba. He's helping to lead the team at the Canadian Microbiology Laboratory that's trying to identify the virus, or viruses that are causing SARS, and he explains how his team goes about identifying what's causing an outbreak like SARS. SARS is a public health problem, but it's also serving as a dry run for the outbreak that many epidemiologists really fear: The next big influenza epidemic. The flu infects millions, and kills thousands of Canadians every year. The worst case scenario for the flu, however, is an oubreak that could kill up to 30% of those it infects like the 1918 flut that killed millions worldwide.
Polycell's Home Page Another coxeter website is at GCS donald coxeter Mathematician. Sadly,Professor coxeter passed away March 31, 2003 at the age of 96. http://members.aol.com/Polycell/next.html
Extractions: YMMETRIC FIGURES th and 20 th centuries found many more. The aesthetic value of such objects was not lost on artists of the Renaissance and the Enlightenment, who used them in their works of art and architecture. Today, a small group of dedicated model-makers continues this gentle, age-old art, producing figures of striking intricacy and beauty. As of January 23, 2000, I have redesigned this website so that a visitor no longer need wait for more than a dozen JPG pictures to download. I broke the single large home page up into several smaller ones, each comprising some of the original text and several pictures from the previous version. I also added some general remarks on the geometry of polyhedra and the craft of polyhedron model-making, and an atlas of Mathematica -generated pictures of the nine regular polyhedra. Link to these pages in the following order to view this website fully and to see more photographs of polyhedron models:
JEHS: References (2nd ed.) (SpringerVerlag, New York). David Cox, John Little, donald O Shea(1992). (Chapman Hall, London). HSM.coxeter (1973). Regular Polytopes. http://www.warwick.ac.uk/statsdept/staff/JEHS/jehrefs.htm
Extractions: MATH PROBLEMS AT SFU CONFERENCE Visualization is a technique often associated with personal problem solving. But many mathematicians say it is just as crucial in their work. The Pacific Institute for the Mathematical Sciences' (PIMS) will explore this connection in its third annual conference Changing the Culture 2000-Visualizing Mathematics on Friday, April 28, at Simon Fraser University's Harbour Centre campus. "The ability to visualize the interaction of lines, shapes and solids is key to understanding and solving complex mathematical problems, especially in geometry. It is also a basis for seeing with your mind's eye more abstract mathematical concepts," notes Malgorzata Dubiel, a lab instructor in SFU's department of mathematics and statistics and the conference's main organizer. Sponsored by PIMS' five founding universities, including SFU, the conference will demonstrate the importance of incorporating visualization techniques in teaching mathematics at all levels of education and in mathematics research. Highlighting the conference will be a public lecture by Donald Coxeter, a master geometer who has written a dozen books and published more than 160 articles on the subject. The professor emeritus of the University of Toronto's math department is famous for his investigtion of regular polytopes-the process of stretching
SF News - May 4, 2000 - Visualizing Mathematics Highlighting the conference was a public lecture by donald coxeter, a master geometerwho has written a dozen books and published more than 160 articles on the http://www.sfu.ca/mediapr/sfnews/2000/May4/coxeter.html
Extractions: "The ability to visualize the interaction of lines, shapes and solids is key to understanding and solving complex mathematical problems, especially in geometry. It is also a basis for seeing with your mind's eye more abstract mathematical concepts," notes Malgorzata Dubiel, a lab instructor in SFU's department of mathematics and statistics and the conference's main organizer. Highlighting the conference was a public lecture by Donald Coxeter, a master geometer who has written a dozen books and published more than 160 articles on the subject. The professor emeritus of the University of Toronto's math department is famous for his investigation of regular polytopes, the process of stretching geometrical shapes into higher-dimensional spaces, real and complex.
COMET - Vol. 4, No. 14 - 25 April 2003 You mean as in HG Wells? says donald coxeter, the other boy. HG (c) donald coxeter Dies; Leader in Geometry by Martin Weil. Source http://csmp.ucop.edu/cmp/comet/2003/04_25_2003.html
Extractions: Articles about H. S. M. Coxeter Professional ConferencesCalls for Speakers Information for prospective speakers at upcoming mathematics education conferences is available at the following Web sites: * Association of Mathematics Teacher Educators Dates: Jan. 22-24, 2004 Location: San Diego, CA (Marriott Mission Valley Hotel) Proposal deadline: May 31, 2003 URL: http://www.sci.sdsu.edu/CRMSE/AMTE/conference/Call_Proposals_2004.htm * National Council of Supervisors of Mathematics Dates: April 19-21, 2004 Location: Philadelphia, PA Proposal deadline: June 1, 2003 URL: http://ncsmonline.org/ncsmreg/ * National Council of Teachers of Mathematics Dates: April 21-24, 2004 Location: Philadelphia, PA Proposal deadline: May 1, 2003 URL: http://www.nctm.org/meetings/philadelphia/philadelphia-faq.htm URL (Regional Meetings): http://www.nctm.org/meetings/speaker.htm
About Planes And Distance To A Plane References. donald coxeter, Introduction to Geometry (2nd Edition),Sect 12.4 Planes and Hyperplanes , John Wiley Sons (1989a). http://softsurfer.com/Archive/algorithm_0104/algorithm_0104.htm
Extractions: Distance of a Point to a Plane by Dan Sunday About Planes Plane Equations Computing Parametric Coordinates Distance of a Point to a Plane ... References Here we present basic information about representing planes, and how to compute the distance of a point to a plane. This will be used in this month's second algorithm about the Intersections of Lines, Segments and Planes. A surface is that which has length and breadth only. [Book I, Definition 5]
Donald L. Kreher Additional Subjects. Characters of Finite coxeter Groups IwahoriHeckeAlgebras. Bleachers A Summer in Wrigley Field. donald L. Kreher. http://mathematicsbooks.org/search_Donald_L._Kreher/searchBy_Author.html
Extractions: Combinatorial algorithms are widely used in a diverse set of applications areas from engineering, the biological and physical sciences, mathematics and computation, economics, and so on. In addition to their applied nature, combinatorial algorithms often rely on sophisticated results in combinatorics and algebra and on clever data structures. This makes the task of introducing the multi-faceted world of combinatorial algorithms a difficult one.Kreher and Stinson have written a modern text tha...
Mousing Around> the occasion of his 90th birthday with a cover story in the University of TorontoMagazine which referred to him as the Venerable donald coxeter high priest http://www.cs.ualberta.ca/~smillie/APE/APE23.html
Extractions: Mousing Around Keith Smillie Chocolate Mathematics In the previous issue of Epilogue there was a problem in which one picked a one-digit number, performed a few arithmetical operations on it, and obtained what might have appeared to be a surprising result. In this column we shall give a simple explanation, but first we shall make a few general remarks about such problems. This problem is typical of a large number of problems, most of which require only some simple arithmetic and possibly a little very elementary mathematics for an explanation. They may be introduced at times into mathematics classes to provide some entertainment while illustrating important mathematical principles. I often used some of them to illustrate positional number systems, both the familiar decimal system and also systems to bases other than ten. The classic book on this topic is Mathematical Recreations and Essays by W. W. Rouse Ball who was a fellow of Trinity College, Cambridge from 1878 to 1905. He may be best known as an historian of mathematics and his short history of mathematics published in 1888 gave a very readable account of the subject. (I recently saw a facsimile edition published a year ago of the fifth edition of this book which appeared in 1912.) Mathematical Recreations was first published in 1892 and has gone through fourteen editions with the last four being revised by H. S. M. Coxeter of the University of Toronto.
Community - Donald Coxeter Has Passed Away News » donald coxeter has passed away. donald coxeter has passed away. donaldcoxeter, one of the greatest geometers of our current age, has passed away. http://www.dstoys.org/public_website/content/newsitems/DSToys_News.2003-04-04.32
Extractions: @import url(http://www.dstoys.org/plone.css?skin=); @import url(http://www.dstoys.org/ploneCustom.css); Skip to content Welcome News Search ... Help You are not logged in Sign in Join You are here: Home Commerce Content News Donald Coxeter has passed away Navigation Community Events Product Forums Recent Submissions Topic Index Commerce Content News Log in Name by Alexander Limi Alan Runyan Vidar Andersen If you can read this text, it means you are not experiencing the Plone design at its best. Plone makes heavy use of CSS, which means it is accessible to any internet browser, but the design needs a standards-compliant browser to look like we intended it . Just so you know ;)
Cmathématique | Arts Et Culture Translate this page En 1954, il rencontre le mathématicien canadien donald coxeter (1907-)à qui il expose son problème. donald coxeter lui présente http://www.cmathematique.com/cgi-bin/index.cgi?page=contenu1_160_6
Photo Gallery 132590 bytes). At a dig in Ghana, 1979 pic7.JPG (185242 bytes). Rienand donald coxeter, June 1991 pic8.JPG (139360 bytes). Don with http://outreach.math.wisc.edu/photo_gallery.htm
Extractions: Donald in 1942, Lincoln, Nebraska: Donald's Parents, Vera and Lawrence Crowe: At the departmental retirement party, with daughter Zannah and Josh Chover: At the departmental retirement party, with Anatole Beck: At the Richland Center UW-College: Lashing rafters in Tonga, 1990: At a dig in Ghana, 1979: Rien and Donald Coxeter, June 1991: Don with students and other friends at the 1997 celebration of 100 years of Math PhD's at Wisconsin. On Ayres Rock, 1989: At the Material Culture Unit of James Cook University, 1989: With grandchildren Amanda, Alex, and Landon, and dog Ole, 1998: At Rainy Lake cabin, 1980: Christmas, 1985, with Zannah, Helen, and Laila: November, 1979: Fiftieth birthday, with Steve and Karen Bauman: Summer, 1996, with Landon: Summer, 1992, with Steve Bauman: San Diego, January 1995, with Mary and sons Brendan and Colin: Cancun, January 1993: Don with Dorothy Washburn, conference at SUNY-Albany in1992: Several pictures at the Symmetry Workshop in Madison, 1999:
PIMS Changing The Culture 2000: Public Lecture Born 9 Feb 1907 in London, England, donald coxeter is always known as donald whichcomes from his third name Macdonald. This needs a little explanation. http://www.pims.math.ca/education/2000/CtC/coxeter/
Extractions: after the start. Abstract: While the public lecture by H.S.M. Coxeter will touch on various mathematical aspects of M.C. Escher's art, its centre-piece is likely to be an examination of Escher's circular woodcuts. The following is Coxeter's introduction (with two minor verbal substitutions for mathematical notation) to a paper which appeared in the Mathematical Intelligencer , No.4, 1966. Born 9 Feb 1907 in London, England, Donald Coxeter is always known as Donald which comes from his third name MacDonald. This needs a little explanation. He was first given the name MacDonald Scott Coxeter, but a godparent suggested that his father's name should be added, so Harold was added at the front. Another relative noted that H M S Coxeter made him sound like a ship. A permutation of the names resulted in Harold Scott MacDonald Coxeter. Donald was educated at the University of Cambridge, receiving his B.A. in 1929. He continued to study for a doctorate at Cambridge under H F Baker, and this was awarded in 1931. He then became a Fellow continuing his researches at Cambridge. During this period he spent two years as a research visitor at Princeton University.
ZDM 31(October 1999)No.5: Abstracts Translate this page him, he received inspiration from a printed figure given in a paper on symmetryby the outstanding geometer Harold Scott Macdonald (called donald) coxeter. http://www.fiz-karlsruhe.de/fiz/publications/zdm/zdm995a.html
Extractions: Herbert Zeitler, Bayreuth (Germany) Ein kurzer Bericht über die Sektion ''Geometrie Schule'' dieser Tagung und eine Liste der Vortragsthemen dieser Sektion. Geometry in Israel. 8th International conference on geometry . A short report of the conference section ''Geometry school'' including a list of papers presented to this section. Full text (PDF) Transformation! - A graphing calculator activity to practice transformations of functions Dane R. Camp, Glen Ellyn, IL (USA) An understanding of function transformation is essential for mastering mathematics in high school and beyond. The classroom activity presented here and the game, "Transformation!", are designed so that students can develop fluency in working with transformations of functions. Both take advantage of the technology of the graphing calculator and the method of cooperative learning. Transformation! - Eine Aktivität zum Umgang mit Transformationen von Funktionen mit Unterstützung graphischer Taschenrechner
2.3 Interviews George Polya, Interviewed On His Ninetieth Birthday 2, GL.Alexanderson, 104, 1979, 259264 An Interview with HSM.coxeter, Dave Logothetti 4,1981, 249-259 A Conversation with Don Knuth Part I, donald J. Albers http://www.maa.org/pubs/cmj-index/history/interviews.txt
Extractions: 2.3 Interviews George Polya, Interviewed on His Ninetieth Birthday, G.L.Alexanderson, 10:1, 1979, 13-19 An Interview with Morris Kline: Part 1, G.L.Alexanderson, 10:3, 1979, 172-178 A Conversation with Martin Gardner, Anthony Barcellos, 10:4, 1979, 233-244 An Interview with Morris Kline: Part 2, G.L.Alexanderson, 10:4, 1979, 259-264 An Interview with H.S.M.Coxeter, Dave Logothetti, 11:1, 1980, 2-19 An Interview with Constance Reid, G.L.Alexanderson, 11:4, 1980, 226-238 An Interview with Stan Ulam, Anthony Barcellos, 12:3, 1981, 182-189 An Interview with Paul Erdos, G.L.Alexanderson, 12:4, 1981, 249-259 A Conversation with Don Knuth: Part I, Donald J. Albers and Lynn Arthur Steen, 13:1, 1982, 2-18 A Conversation with Don Knuth, Part 2, Donald J. Albers and Lynn Arthur Steen, 13:2, 1982, 128-141 John G. Kemeny: Computer Pioneer, Lynn Arthur Steen, 14:1, 1983, 18-35 A Conversation with Garrett Birkhoff, G.L.Alexanderson and Carroll Wilde, 14:2, 1983, 126-145 An Interview with Albert W. Tucker, Stephen B. Maurer, 14:3, 1983, 210-214 An Interview with Herbert Robbins, Warren Page, 15:1, 1984, 2-24 A Conversation with Henry Pollak, Donald J. Albers and Michael J. Thibodeaux, 15:3, 1984, 194-219 An Interview with the 1985 USA Team to the International Mathematical Olympiad, Warren Page, 16:5, 1985, 336-360 An Interview with George B. Dantzig: The Father of Linear Programming, Donald J. Albers and Constance Reid, 17:4, 1986, 292-304, 9.6 An Interview with Lipman Bers, Donald J. Albers and Constance Reid, 18:4, 1987, 266-290 An Interview with Mary Ellen Rudin, Donald J. Albers and Constance Reid, 19:2, 1988, 114-137 A Conversation with Saunders Mac Lane, Gerald L. Alexanderson, 20:1, 1989, 2-26 A Conversation with Robin Wilson, D.J.Albers and G.L.Alexanderson, 21:3, 1990, 178-195 Interview with Irving Kaplansky, Donald J. Albers, 22:2, 1991, 98-117 A Conversation with Ivan Niven, Donald J. Albers and G.L.Alexanderson, 22:5, 1991, 370-402 A Conversation with Leon Bankoff, G.L.Alexanderson, 23:2, 1992, 98-117 A Conversation with Richard K. Guy, Donald J. Albers and Gerald L. Alexanderson, 24:2, 1993, 122-148 Freeman Dyson: Mathematician, Physicist, and Writer, Donald J. Albers, 25:1, 1994, 2-21 Still Questioning Authority: An Interview with Jean Taylor, Don Albers, 27:4, 1996, 250-266 An Interview with Tom Apostol, Donald J. Albers, 28:4, 1997, 250-270 An Interview with Lars V. Ahlfors, Donald J. Albers, 29:2, 1998, 82-92 In Love with Geometry, Dan Pedoe, 29:3, 1998, 170-188 Coming to America: The Journey of an Immigrant Scholar, Clifford H. Wagner, 30:1, 1999, 2-17
Historia Matematica Mailing List Archive: Re: [HM] J.F.Petrie met when he was 14. In a web page on donald coxeter Mathematicianand Geometer we read q The Story. The aroma of antiseptic http://sunsite.utk.edu/math_archives/.http/hypermail/historia/aug99/0169.html
The Silhouette Online Edition Witelson will be able to confirm these suspicions with her newestacquisition, the brain of mathematical genius donald coxeter. http://sil.mcmaster.ca/archives/030925/life/030925ein.html
Extractions: Thomas Harvey, the pathologist responsible for the autopsy and subsequent removal of Einsteins brain, was on hand at the time of death. Although it is often disputed, Harvey received consent for the procedure from both Einstein and his next of kin. Bizarrely, Harvey also gained ownership of the brain, which has been in his possession since. Several accusations have been launched surrounding Harveys treatment of the brain; among these is Carolyn Abrahams allegation in her publication Possessing Genius: The Bizarre Odyssey of Einsteins Brain that Harvey stored the sectioned brain in two mason jars, inside two cardboard boxes marked Costa Cider. Whether fact or fiction, Harvey maintained ownership of the brain, soliciting lab work from various professionals. Consequently, Einsteins brain was well-preserved and documented. Harvey has lent the brain to three major studies over the years, one of the most celebrated being conducted at McMaster University by Sandra Witelson. Witelson was the first to detect both qualitative and statistically quantitative differences between Einsteins brain and a control group of brains. Her paper, The Exceptional Brain of Albert Einstein, published in The Lancet (June, 1999), has caused quite a stir among neuroscientists, psychologists and the general public.
