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Topic: Derrick Henry Lehmer

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	US Bazaar.com : Encyclopedia Pages : Derrick Henry Lehmer
		Lehmer was born in Berkeley, California, to Derrick Norman Lehmer, a professor of mathematics at the University of California, Berkeley, and Clara Eunice Mitchell.
		Lehmer was chairman of the Department of Mathematics at University of California, Berkeley from 1954 until 1957.
		In 1950, Lehmer was one of 31 University of California faculty fired after refusing to sign a loyalty oath, a policy initiated by the Board of Regents of the State of California in 1950 during the Communist scare personified by Senator Joseph McCarthy.
	encyclopedia.us-bazaar.com /?title=Derrick_Henry_Lehmer (901 words)

	[No title]
		Honoring the Lehmer mathematical family, the Lehmer Conference was held at the end of August, 2000 at UC Berkeley.
		Many Lehmer family members attended the banquet held on the second day of the conference, and several described childhood experiences and the influence that D.H. and Emma had on their lives.
		He collaborated with his son, Derrick Henry, in devising an ingenious, complicated calculating machine, using both electricity and light, and capable of determining whether any given number, even of astronomic size, is a prime.
	math.berkeley.edu /publications/newsletter/2000/articles2000/Lehmer (323 words)

	Lehmer_Derrick
		Lehmer and his wife remained at Lehigh until 1940 except for the year 1938-39 which they spent in England visiting both the University of Cambridge and the University of Manchester.
		For Lehmer, however, the problem was not so acute for he was able to take up the post of Director of the National Bureau of Standards' Institute for Numerical Analysis for the time that he was unable to hold his faculty position in Berkeley.
		Lehmer was awarded an honorary degree from Brown University in 1980.
	www.educ.fc.ul.pt /icm/icm2003/icm14/Lehmer_Derrick.htm (1527 words)

	The Lehmers at Berkeley Exhibit: D. H. and Emma Lehmer
		Derrick (“Dick”) H. Lehmer was born in Berkeley in 1905.
		Emma Trotskaia Lehmer was born in Samara, Russia in 1906, and at the age of 4 moved with her family to Manchuria where her father worked for a Russian sugar company.
		Emma Lehmer was admitted to UC Berkeley and received her B.A. degree with highest honors in Mathematics in 1928.
	bancroft.berkeley.edu /Exhibits/Math/dhla.html (626 words)

	Lehmer_Derrick biography
		His parents were Clara Eunice Mitchell and Derrick Norman Lehmer (often called DNL to distinguish him from his son DHL, or as we noted Dick).
		In 1927 Lehmer graduated from Berkeley with a B.A. degree in Physics and he went to the University of Chicago to undertake research for his doctorate in mathematics with L E Dickson as his supervisor.
		Lehmer's life over the next few years involved moving from place to place hoping for a permanent university post in the particularly difficult times of the Great Depression.
	www-history.mcs.st-andrews.ac.uk /Biographies/Lehmer_Derrick.html (1570 words)

	The Lehmers at Berkeley Exhibit: Introduction
		Derrick Norman Lehmer joined the mathematics faculty at Berkeley in 1900, and later served as Chair of the Department.
		Son Derrick Henry (Dick, as he was known to friends and family) received a bachelor's degree in Physics at Berkeley, and later continued the Berkeley tradition of the family as professor and Chair of the Mathematics Department.
		Derrick Henry and Emma Lehmer worked together as a team for sixty years, influencing many through their broad knowledge and expertise in mathematics, as well as their sociability.
	bancroft.berkeley.edu /Exhibits/Math/intro.html (501 words)

	Portraits of Derrick Norman Lehmer (1867 - 1938)
		Portraits of Derrick Norman Lehmer (1867 - 1938)
		Both Derrick N. Lehmer and Derrick H. Lehmer were professors of Mathematics at the University of California, Berkeley.
		Derrick and Eunice Mitchell Lehmer at Decatur, Ill., June 10, 1932.
	rlehmer.home.netcom.com /DNL (219 words)

	Derrick Henry Lehmer - Wikipedia, wolna encyklopedia
		W czasie studiów w Berkeley Derrick Henry Lehmer poznałał Rosjankę, Emmę Markowną Trocką, urodzoną w roku 1906, która studiowała nauki techniczne, zmieniła jednak zainteresowania i przeniosła się na matematykę; w tej dyscyplinie nauki uzyskała dyplom (bakalaureat) w roku 1928.
		Derrick Henry Lehmer otrzymał w Brown University najpierw magisterium, potem (w roku 1930) doktorat.
		W roku 1940 Derrick Henry Lehmer otrzymał propozycję pracy na Wydziale Matematyki University of California w Berkeley.
	pl.wikipedia.org /wiki/Derrick_Henry_Lehmer (255 words)

	Emma Lehmer (Site not responding. Last check: 2007-10-19)
		Her father-in-law, Derrick Norman Lehmer, was also a mathematician who had employed Emma (at student wages) to do some tedious tabulating work that his son was also helping him with.
		Emma and her husband moved to Brown University where D.H. Lehmer received his Ph.D. in mathematics and Emma Lehmer received a master's degree, both in 1930.
		In August 2000, UC Berkeley hosted the Lehmer Conference to highlight the mathematical contributions, inventions, and influences from Derrick Norman Lehmer, Derrick Henry Lehmer, and Emma Lehmer.
	www.agnesscott.edu /lriddle/women/lehmer.htm (343 words)

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		Lehmer's machines search numbers sequentially, from any starting point that may be chosen, looking for a number that has an acceptable remainder modulo, each of a number of primes.
		Derrick Henry Lehmer is the son of a leading American number theorist, Derrick Norman Lehmer (1867-1938).
		Lehmer continues to use computers, such as the Cray 1 and ILLIAC IV, to support his work with number theory.
	ed-thelen.org /comp-hist/TheCompMusRep/TCMR-V04.html (7948 words)

	Lehmer's Problem
		Mahler's measure of a polynomial f is defined to be the absolute value of the product of those roots of f which lie outside the unit disk, multiplied by the absolute value of the coefficient of the leading term of f.
		Lehmer's problem, sometimes called Lehmer's question, or Lehmer's conjecture, asks if there exists a constant C > 1 such that every polynomial f with integer coefficients and M(f) > 1 has M(f)
		Lehmer added the following remark in his 1933 paper (using Ω to denote the measure):
	www.cecm.sfu.ca /~mjm/Lehmer/lc.html (493 words)

	Amazon.com: "Derrick Henry": Key Phrase page (Site not responding. Last check: 2007-10-19)
		Lehmer, Derrick Henry (1905-1991) 135 ;r(x) = x/(log(x) - A) as x tends to infinity: he supposed from his experimental evidence that...
		Derrick Henry, "Arts and Entertainment," AtlantaJournal and Constitution, 27 July 1995; and "Columbia Orchestra Takes Up Mozart, Mixes in Mendelssohn," Baltimore...
		Collection of articles dedicated to Derrick Henry Lchmer on the occasion of his seventieth birthday.
	www.amazon.com /phrase/Derrick-Henry (481 words)

	Untitled Document (Site not responding. Last check: 2007-10-19)
		Emma Lehmer, widow of D. H., and one of 3 Lehmers honored at conference
		John Brillhart with photo of D.N. Lehmer in background.
		D.H. Lehmer's grandson Ron demonstrating replica of bicycle chain sieve built by D.H.
	math.berkeley.edu /publications/newsletter/2000/lehmer.html (378 words)

	Amazon.com: "Lucas Lehmer": Key Phrase page (Site not responding. Last check: 2007-10-19)
		For the survivors, one then invokes the celebrated Lucas Lehmer test, which is a rigorous prinlality test (see Chapter 3).
		As of this writing the known Mersenne primes are those...
		In his PhD thesis he proposed the Lucas- Lehmer test for Mersenne primes.
	www.amazon.com /phrase/Lucas-Lehmer (573 words)

	Edouard Lucas
		He devised methods for testing the primality of numbers.
		Later Derrick Henry Lehmer refined his work and obtained the Lucas-Lehmer test for Mersenne numbers.
		Lucas was also interested in recreational mathematics; the Tower of Hanoi puzzle was invented by him.
	www.teachersparadise.com /ency/en/wikipedia/e/ed/edouard_lucas.html (156 words)

	New prime gaps between 10^15 and 5*10^16
		The search for first occurrence and maximal prime gaps was previously extended to 10^15 by the works of Glaisher [7], Western [18], Lehmer [10], Appel and Rosser [1], Lander and Parkin [9], Brent [2, 3], Young and Potler [20], and Nicely [12].
		Marc Deléglise and Joël Rivat, "Computing pi(x): the Meissel, Lehmer, Lagarias, Miller, Odlyzko method," Math.
		Derrick Henry Lehmer, "Tables concerning the distribution of primes up to 37 millions," 1957.
	www.trnicely.net /gaps/gaps3.html (2044 words)

	A Guide to the H. S. Vandiver Papers, 1889-1977
		The suitcase in the collection was said to have been kept by Vandiver for storing current work in his campus office.
		Lehmer, D. ["Lehmer and V. correspondence on joint article of 1954 on F. T."], 1951-1953 and undated
		Lehmer [“Correspondence on his Bernoulli number project under Amer.
	www.lib.utexas.edu /taro/utcah/00303/00303-P.html (3822 words)

	The Mathematics Genealogy Project - Derrick Lehmer
		Click here to see the students listed in chronological order.
		According to our current on-line database, Derrick Lehmer has 19 students and 172 descendants.
		If you have additional information or corrections regarding this mathematician, please use the update form.
	www.genealogy.ams.org /html/id.phtml?id=4283 (78 words)

	1905 - TvWiki, the free encyclopedia (Site not responding. Last check: 2007-10-19)
		February 23 - Derrick Henry Lehmer, American mathematician (d.
		May 15 - Joseph Cotten, American actor (d.
		May 16 - Henry Fonda, American actor (d.
	www.tvwiki.tv /wiki/1905 (1667 words)

	[No title] (Site not responding. Last check: 2007-10-19)
		Derrick Henry Lehmer Obituary (From the Number Theory Web, reproduced, with permission, from Acta Arithmetica 62 (1992) 207-213)
		(If anyone knows of web pages about D. Lehmer, Jacob Tamarkin or J. Von Littrov, I would be very pleased to hear about them)
		When I became a graduate student in the Math Dept at the University of Illinois I got the chance, for the first time to make a personal webpage.
	www.trincoll.edu /~jmclaugh (841 words)

	The On-Line Encyclopedia of Integer Sequences
		D. Lehmer, "List of Prime Numbers from 1 to 10,006,721", Carnegie Institute, Washington, D.C. LeVeque, Topics in Number Theory.
		D. Lehmer, Table of the First 2500 Prime Numbers, Carnegie Institute of Washington,1914.
		W. Liang & H. Yan, Pseudo Random test of prime numbers
	www.research.att.com /~njas/sequences/A000040 (1367 words)

	[No title]
		Johnson, G. Lehmer, Derrick Henry Lehmer, Emma Lomont, John S. Morrison, Michael A. Silverman, Robert D. Tonascia, J. Tuckerman, Bryant WAGSTAFF, SAMUEL S., JR.
		Molnar, Jozsef SAUER, NORBERT W. Wills, Jorg M. Busemann, Herbert CHUNG, KAI-LAI Elliott, Joanne Forsythe, George E. McKean, Henry P., Jr.
		Bruckman, Paul S. Carlitz, Leonard Chow, Bob CHUNG, FAN RONG K. Cox, Nannette Davis, Basil Edgar, Hugh Eves, Howard W. Fielder, Daniel C. Gould, Henry Wadsworth GRAHAM, RONALD L. Hillman, Abraham P. Junge, Bjarne Kim, Jin Bai King, Ellen L. Kleiman, Mark Kramer, Judy Leonard, H. T., Jr.
	www.oakland.edu /enp/Erdos1 (426 words)

	Technology, Invention, and Innovation Collections
		Chairman: John von Neumann, Members: Howard H. Aiken, Walter Bartky, Samuel H. Caldwell, George R. Stibitz, Warren Weaver, to study principles and possibilities of machines to find ways of increasing speed of computation to distribute information to interested parties.
		Published by the National Research Council; A Quarterly Journal edited on behalf of the Committee on Mathematical Tables and Other Aids to Computation by Raymond Clare Archibald (and) Derrick Henry Lehmer.
		III * Number 22 * April 1948 (2 copies)
	americanhistory.si.edu /archives/d8324a.htm (4863 words)

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