41. Leonhard Euler euler, leonhard, la ônhärt oi lur Pronunciation Key. euler, leonhard , 1707–83,Swiss mathematician. Born and educated at Basel, where he knew the http://www.factmonster.com/ce6/people/A0817838.html

Home U.S. People Word Wise ... Homework Center Fact Monster Favorites 2006 TFK Almanac Quiz: Charlie and the Chocolate Factory SpongeBob Lemony Snicket ... Fantasy Books Reference Desk Atlas Almanacs Dictionary Encyclopedia ... Encyclopedia Euler, Leonhard u r] Pronunciation Key Euler, Leonhard , Swiss mathematician. Born and educated at Basel, where he knew the Bernoullis, he went to St. Petersburg (1727) at the invitation of Catherine I, becoming professor of mathematics there on the departure of Daniel Bernoulli (1733). He was invited to Berlin (1741) by Frederick the Great and remained there until 1766, when he returned to St. Petersburg. Euler was the most prolific mathematician who ever lived; his collected works run to more than seventy volumes. He contributed to numerous areas of both pure and applied mathematics, including the calculus of variations, analysis, number theory, algebra, geometry, trigonometry, analytical mechanics, hydrodynamics, and the lunar theory (calculation of the motion of the moon). Euler was one of the first to develop the methods of the calculus on a wide scale. Though half-blind for much of his life and totally blind for the last seventeen years, he retained to the end a near-legendary skill at calculation. Among his results are the differential equation named for him, the formula relating the number of faces, edges, and vertices of a polyhedron (

42. Leonhard Euler euler, leonhard (17071783) (The Hutchinson Dictionary of Scientific Biography).euler, leonhard (The Hutchinson Encyclopedia) http://www.infoplease.com/ce6/people/A0817838.html

in All Infoplease Almanacs Biographies Dictionary Encyclopedia Daily Almanac for Sep 1, 2005 Skip Navigation Home Almanacs ... Word of the Day Editor's Favorites Back to School Hurricanes Daylight Saving Time School Shootings ... Mississippi Infoplease Tools Periodic Table Conversion Tool Perpetual Calendar Year by Year ... Site Map College Center Scholarship Search College Resources Career Center Job Search Post Your Resume Continuing Ed. more . . . Search: Infoplease Info search tips Search: Biographies Bio search tips google_ad_client = 'pub-1894504138907931'; google_ad_width = 120; google_ad_height = 240; google_ad_format = '120x240_as'; google_ad_type = 'text'; google_ad_channel =''; google_color_border = ['336699','B4D0DC','DFF2FD','B0E0E6']; google_color_bg = ['FFFFFF','ECF8FF','DFF2FD','FFFFFF']; google_color_link = ['0000FF','0000CC','0000CC','000000']; google_color_url = ['008000','008000','008000','336699']; google_color_text = ['000000','6F6F6F','000000','333333']; Encyclopedia Euler, Leonhard u r] Pronunciation Key Euler, Leonhard , Swiss mathematician. Born and educated at Basel, where he knew the Bernoullis, he went to St. Petersburg (1727) at the invitation of Catherine I, becoming professor of mathematics there on the departure of Daniel Bernoulli (1733). He was invited to Berlin (1741) by Frederick the Great and remained there until 1766, when he returned to St. Petersburg. Euler was the most prolific mathematician who ever lived; his collected works run to more than seventy volumes. He contributed to numerous areas of both pure and applied mathematics, including the calculus of variations, analysis, number theory, algebra, geometry, trigonometry, analytical mechanics, hydrodynamics, and the lunar theory (calculation of the motion of the moon). Euler was one of the first to develop the methods of the

43. Leonhard Euler -- Facts, Info, And Encyclopedia Article leonhard euler was the first to use the term (A mathematical relation such that leonhard euler was born on April 15, 1707 as the son of a (Follower of http://www.absoluteastronomy.com/encyclopedia/l/le/leonhard_euler.htm

Leonhard Euler [Categories: People with asteroids named after them, Swiss physicists, Number theorists, 18th century mathematicians, Swiss mathematicians, 1783 deaths, 1707 births] Leonhard Euler (The natives or inhabitants of Switzerland) Swiss (A person skilled in mathematics) mathematician and (A scientist trained in physics) physicist . He is considered to be one of the greatest mathematicians who ever lived. Leonhard Euler was the first to use the term " (A mathematical relation such that each element of one set is associated with at least one element of another set) function " (defined by (German philosopher and mathematician who thought of the universe as consisting of independent monads and who devised a system of the calculus independent of Newton (1646-1716)) Leibniz - 1694) to describe an (Expression without words) expression involving various (A fact or assertion offered as evidence that something is true) argument s; ie: y = F( x ). He is credited with being one of the first to apply (A hard lump produced by the concretion of mineral salts; found in hollow organs or ducts of the body) calculus to (The science of matter and energy and their interactions) physics Born and educated in (A city in northwestern Switzerland) Basel , he was a mathematical (A prodigy whose talents are recognized at an early age) child prodigy . He worked as a (Someone who is a member of the faculty at a college or university) professor of mathematics in (A city in western Florida on Tampa Bay; a popular winter resort)

44. Euler, Leonhard euler, leonhard (17071783). Swiss mathematician. He developed the theory ofdifferential equations and the calculus of variations, and worked in astronomy http://www.cartage.org.lb/en/themes/Biographies/MainBiographies/E/Euler/1.html

Euler, Leonhard Swiss mathematician. He developed the theory of differential equations and the calculus of variations, and worked in astronomy and optics. He also enlarged mathematical notation. Euler developed spherical trigonometry and demonstrated the significance of the coefficients of trigonometric expansions; Euler's number (e, as it is now called) has various useful theoretical properties and is used in the summation of particular series. Euler was born and educated in Basel, a pupil of Johann Bernoulli . He became professor of physics at the University of St Petersburg 1730. In 1741 he was invited to Berlin by Frederick the Great, where he spent 25 years before returning to Russia. Euler carried out research into the motion and positions of the Moon, and the gravitational relationships between the Moon, the Sun, and the Earth. His resulting work on tidal fluctuations took him into the realm of fluid mechanics.

45. PlanetMath: Euler, Leonhard leonhard euler was born on April the 15th 1707 as the son of a Protestant Paul euler, leonhard s father, had attended Jakob Bernoulli s mathematical http://planetmath.org/encyclopedia/EulerLeonhard.html

(more info) Math for the people, by the people. Encyclopedia Requests Forums Docs ... Random Login create new user name: pass: forget your password? Main Menu sections Encyclop¦dia Papers Books Expositions meta Requests Orphanage Unclass'd Unproven ... Classification talkback Polls Forums Feedback Bug Reports downloads Snapshots PM Book information News Docs Wiki ChangeLog ... About Leonhard Euler (Biography) Leonhard Euler was born on April the 15th 1707 as the son of a Protestant minister in Basel (Switzerland). Already in his childhood he exhibited great mathematical talents, but his father wanted him to study theology and become a minister. In 1720 Euler began his studies at the University of Basel. There Euler met Daniel and Nikolaus Bernoulli, who noticed Euler's skills in mathematics. Paul Euler, Leonhard's father, had attended Jakob Bernoulli's mathematical lectures and respected his family. When Daniel and Nikolaus Bernoulli asked him to allow his son to study mathematics he finally agreed and Euler began to study mathematics. In 1727 Euler was called to St. Petersburg by Catherine I. and became professor of physics in 1730. Finally in 1733 he became professor of mathematics. His work was both in physics and mathematics. Euler was the first to publish a systematic introduction to mechanics in 1736: ``Mechanica sive motus scientia analytice exposita'' (Mechanics or motion explained with analytical science (that is, calculus)). 1735 he lost much of his vision in the right eye because he had looked into the sun for too long.

46. Euler, Leonhard. euler, leonhard. leonhard euler, b. Apr. 15, 1707, d. Sept. 18, 1783, was themost prolific mathematician in history. His 866 books and articles represent http://euler.ciens.ucv.ve/English/mathematics/euler.html

Euler, Leonhard. In 1741, Euler joined the Berlin Academy of Science, where he remained for 25 years. In 1744 he became director of the academy's mathematics section. During his stay in Berlin, he wrote over 200 articles, three books on mathematical analysis, and a scientific popularization, Letters to a Princess of Germany (3 vols., 1768-72). In 1755 he was elected a foreign member of the Paris Academy of Science; during his career he received 12 of its prestigious biennial prizes. In 1766, Euler returned to Russia, after Catherine the Great had made him a generous offer. At the time, Euler had been having differences with Frederick the Great over academic freedom and other matters. Frederick was greatly angered at his departure and invited Lagrange to replace him. In Russia, Euler became almost entirely blind after a cataract operation, but was able to continue with his research and writing. He had a prodigious memory and was able to dictate treatises on optics, algebra, and lunar motion. At his death in 1783, he left a vast backlog of articles. The St. Petersburg Academy continued to publish them for nearly 50 more years. Author: R. Calinger

47. Escuela De Matemáticas - UCV Translate this page euler, leonhard. leonhard euler, nacido en Abr. 15, 1707, muerto en Sept. 18,1783, fue el matemático más prolífico en la historia. http://euler.ciens.ucv.ve/matematicos/euler.html

Los Matemáticos más famosos de todos los Tiempos: Niels Henrik Abel Arquímedes Banach, Stefan Bessel, Friedrich ... Euler, Leonhard En 1741 Euler se unió a la Academia de Ciencia de Berlín, donde permaneció por 25 años. En 1744 llegó a ser director de la sección de matemáticas de la academia. Durante su estancia en Berlín, escribió por encima de 200 artículos, tres libros en análisis matemático, y una divulgación científica, Cartas a una Princesa de Alemania (3 [vols]., 1768-72). En 1755 fue electo un miembro extranjero de la Academia de Ciencias de París; durante su carrera recibió 12 prestigiosos premios bienales. En 1766 Euler volvió a Rusia, después de hacerle Caterina la Grande una oferta generosa. Al su vez Euler había tenido diferencias con Federico el Grande por la libertad académica y otras materias. Federico de encolerizo grandemente a su partida e invitó a Lagrange para reemplazarlo. En Rusia Euler llegó a estar casi completamente ciego después de una operación de cataratas, pero aún así podía continuar con su investigación y escritura. Tenía una memoria prodigiosa y podía dictar tratados en óptica, álgebra, y movimiento lunar. A su muerte en 1783, dejó atrasados una vasta cantidad de artículos. La Academia de St. Petersburg continuó publicándolos por casi 50 años más.

48. Euler, Leonhard Overtaxing himself, euler in 1735 lost the sight of one eye. After Frederickthe Great became less cordial toward him, euler in 1766 accepted the http://www.phy.bg.ac.yu/web_projects/giants/euler.html

Leonhard Euler (b. April 15, 1707, Basel, Switz.d. Sept. 18, 1783, St. Petersburg, Russia), Swiss mathematician and physicist, one of the founders of pure mathematics. He not only made decisive and formative contributions to the subjects of geometry, calculus, mechanics, and number theory but also developed methods for solving problems in observational astronomy and demonstrated useful applications of mathematics in technology and public affairs. Euler's mathematical ability earned him the esteem of Johann Bernoulli, one of the first mathematicians in Europe at that time, and of his sons Daniel and Nicolas. In 1727 he moved to St. Petersburg, where he became an associate of the St. Petersburg Academy of Sciences and in 1733 succeeded Daniel Bernoulli to the chair of mathematics. By means of his numerous books and memoirs that he submitted to the academy, Euler carried integral calculus to a higher degree of perfection, developed the theory of trigonometric and logarithmic functions, reduced analytical operations to a greater simplicity, and threw new light on nearly all parts of pure mathematics. Overtaxing himself, Euler in 1735 lost the sight of one eye. Then, invited by Frederick the Great in 1741, he became a member of the Berlin Academy, where for 25 years he produced a steady stream of publications, many of which he contributed to the St. Petersburg Academy, which granted him a pension. In 1748, in his

49. Leonhard Euler The gratest mathematician of the eighteenth century, leonhard euler (17071783),grew up near Basel and was a student of Johann Bernoulli. http://www.mu.org/~doug/exp/about.html

Euler, Leonhard (1707-83) Mathematician, born in Basel, Switzerland. He studied mathematics there under Jean Bernoulli, and became professor of physics (1731) and then of mathematics (1733) at the St. Petersburg Academy of Sciences. In 1738 he lost the sight of one eye. In 1741 he moved to Berlin as director of mathematics and physics in the Berlin Academy, but returned to St. Petersburg in 1766, soon afterwards losing the sight of his other eye. He was a giant figure in 18th-c mathematics, publishing over 800 different books and papers, on every aspect of pure and applied mathematics, physics and astronomy. His Introductio in analysin infinitorum (1748) and later treatises on differential and integral calculus and algebra remained standard textbooks for a century and his notations, such as e and (pi) have been used ever since. For the princess of Anhalt-Dessau he wrote (1768-72), giving a clear non-technical outline of the main physical theories of the time. He had a prodigious memory, which enabled him to continue mathematical work and to compute complex calculations in his head when he was totally blind. He is without equal in the use of algorithms to solve problems. Euler, Leonhard (1707-83)

50. MSN Encarta - Euler euler, leonhard (17071783), Swiss mathematician, whose major work was done inthe field euler, leonhard, Microsoft® Encarta® Online Encyclopedia 2005 http://encarta.msn.com/encyclopedia_761556057/Euler.html

MSN Home My MSN Hotmail Shopping ... Sign In Web Search: Encarta Subscriber Sign In Help Home ... Upgrade your Encarta Experience Search Encarta Upgrade your Encarta Experience Spend less time searching and more time learning. Learn more Tasks Find in this article Print Preview Related Items experiments with sound K¶nigsberg bridge problem more... Further Reading Search for books and more related to Euler, Leonhard Encarta Search Search Encarta about Euler, Leonhard Advertisement Euler, Leonhard Encyclopedia Article Multimedia 1 item Euler, Leonhard (1707-1783), Swiss mathematician, whose major work was done in the field of pure mathematics , a field that he helped to found. Euler was born in Basel and studied at the University of Basel under the Swiss mathematician Johann Bernoulli, obtaining his master's degree at the age of 16. In 1727, at the invitation of Catherine I , empress of Russia, Euler became a member of the faculty of the Academy of Sciences in Saint Petersburg. He was appointed professor of physics in 1730 and professor of mathematics in 1733. In 1741 he became professor of mathematics at the Berlin Academy of Sciences at the urging of the Prussian king Frederick the Great. Euler returned to Saint Petersburg in 1766, remaining there until his death. Although hampered from his late 20s by partial loss of vision and in later life by almost total blindness , Euler produced a number of important mathematical works and hundreds of mathematical and scientific memoirs.

51. MSN Encarta - Multimedia - Leonhard Euler Although hindered by loss of sight, leonhard euler was an important contributorto both pure and applied mathematics. euler is best known for his analytical http://encarta.msn.com/media_461515527_761578291_-1_1/Leonhard_Euler.html

MSN Home My MSN Hotmail Shopping ... Sign In Web Search: Encarta Subscriber Sign In Help Home ... Upgrade your Encarta Experience Search Encarta Multimedia from Encarta Go to article View all multimedia Appears in Leonhard Euler Although hindered by loss of sight, Leonhard Euler was an important contributor to both pure and applied mathematics. Euler is best known for his analytical treatment of mathematics and his discussion of calculus concepts, but he is also credited for work in acoustics, mechanics, astronomy, and optics. Culver Pictures Appears in these articles: Mathematics; Euler, Leonhard Exclusively for MSN Encarta Premium Subscribers. Join Now © 2005 Microsoft MSN Privacy Legal Advertise Feedback ... Help

52. April 15: Mathematician Leonhard Euler Born birth of mathematician leonhard euler. His name was leonhard euler. The sonof a Protestant minister, euler was born on this day, April 15, 1707, http://chi.gospelcom.net/DAILYF/2002/04/daily-04-15-2002.shtml

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53. Euler, Leonhard (1707-1783) euler, leonhard (17071783). A Swiss mathematician who, along with Joseph Lagrange,Pierre Laplace, and others, helped develop the science of celestial http://www.daviddarling.info/encyclopedia/E/Euler.html

Return to The Worlds of David Darling INDEX LATEST NEWS ARCHIVE ... Z entire Web this site Euler, Leonhard (1707-1783) A Swiss mathematician who, along with Joseph Lagrange , Pierre Laplace , and others, helped develop the science of celestial mechanics . He applied powerful new mathematical techniques to problems of cometary orbits, planetary perturbations , and the tides. He also refined the theory of the Moon’s motion and calculated more accurate orbits for Jupiter and Saturn. BACK TO TOP var site="s13space1234"

54. Euler, Leonhard (1707-1783) -- From Eric Weisstein's World Of Scientific Biograp leonhard euler Art History Online Reference and Guideleonhard euler - Art History Online Reference and Guide. http://www.astro.virginia.edu/~eww6n/bios/Euler.html

Branch of Science Mathematicians Nationality Swiss Euler, Leonhard (1707-1783) Swiss mathematician who was tutored by Johann Bernoulli . He worked at the Petersburg Academy and Berlin Academy of Science. He had a phenomenal memory, and once did a calculation in his head to settle an argument between students whose computations differed in the fiftieth decimal place. Euler lost sight in his right eye in 1735, and in his left eye in 1766. Nevertheless, aided by his phenomenal memory (and having practiced writing on a large slate when his sight was failing him), he continued to publish his results by dictating them. Euler was the most prolific mathematical writer of all times finding time (even with his 13 children) to publish over 800 papers in his lifetime. He won the Paris Academy Prize 12 times. When asked for an explanation why his memoirs flowed so easily in such huge quantities, Euler is reported to have replied that his pencil seemed to surpass him in intelligence. said of him "He calculated just as men breathe, as eagles sustain themselves in the air" (Beckmann 1971, p. 143; Boyer 1968, p. 482). Euler systematized mathematics by introducing the symbols e i , and f x ) for f a function of x . He also made major contributions in optics, mechanics, electricity, and magnetism. He made significant contributions to the study of differential equations. His

55. The Euler Commission WebSite of The euler Commission, Editors of the Opera Omnia of leonhard euler. http://www.leonhard-euler.ch/

56. Read About Leonhard Euler At WorldVillage Encyclopedia. Research Leonhard Euler leonhard euler. Everything you wanted to know about leonhard euler but had noclue how to find it.. Learn about leonhard euler here! http://encyclopedia.worldvillage.com/s/b/Leonhard_Euler

Culture Geography History Life ... WorldVillage Leonhard Euler From Wikipedia, the free encyclopedia. Leonhard Euler aged 49 (oil painting by Emanuel Handmann Leonhard Euler April 15 September 18 ) was a Swiss mathematician and physicist . He is considered to be one of the greatest mathematicians who ever lived. Leonhard Euler was the first to use the term " function " (defined by Leibniz ) to describe an expression involving various arguments ; ie: y = F( x ). He is credited with being one of the first to apply calculus to physics Born and educated in Basel , he was a mathematical child prodigy . He worked as a professor of mathematics in Saint Petersburg , later in Berlin , and then returned to Saint Petersburg. He is the most prolific mathematician of all time, his collected work filling 75 volumes. He dominated eighteenth century mathematics and deduced many consequences of the newly invented calculus . He was completely blind for the last seventeen years of his life, during which time he produced almost half of his total output. The asteroid 2002 Euler is named in his honour.

57. Science: Mathematics: Mathematicians: Euler, Leonhard - Open Site Science Mathematics Mathematicians euler, leonhard Open Site. http://open-site.org/Science/Mathematics/Mathematicians/Euler,_Leonhard/

Open Site The Open Encyclopedia Project home submit content become an editor the entire directory only in Mathematicians/Euler,_Leonhard Top Science Mathematics Mathematicians : Euler, Leonhard Biography Euler wrote an immense number of memoirs on all kinds of mathematical subjects. His chief works included many of the results of earlier memoirs. First, he wrote in 1748 his Introductio in Analysin Infinitorum, which was intended to serve as an introduction to pure analytical mathematics. This is divided into two parts. The Analysis Infinitorum was followed in 1755 by the Institutiones Calculi Differentialis, to which it was intended as an introduction. This is the first text-book on the differential calculus which has any claim to be regarded as complete, and it may be said that until recently many modern treatises on the subject are based on it; at the same time it should be added that the exposition of the principles of the subject is often prolix and obscure, and sometimes not altogether accurate. This series of works was completed by the publication in three volumes in 1768 to 1770 of the Institutiones Calculi Integralis, in which the results of several of Euler's earlier memoirs on the same subject and on differential equations are included. This, like the similar treatise on the differential calculus, summed up what was then known on the subject, but many of the theorems were recast and the proofs improved. The Beta and Gamma functions were invented by Euler and are discussed here, but only as illustrations of methods of reduction and integration. His treatment of elliptic integrals is superficial; it was suggested by a theorem, given by John Landen in the Philosophical Transactions for 1775, connecting the arcs of a hyperbola and an ellipse. Euler's works that form this trilogy have gone through numerous subsequent editions.

58. Biografía De Euler Translate this page de la historia) fue leonhard euler (1707-1783), que nació en Basilea. El padrede euler era un pastor calvinista que, lo mismo que el padre de Jacques http://thales.cica.es/rd/Recursos/rd97/Biografias/28-2-B-E.html

Biografía de Euler Suiza: centro matemático A finales del siglo XVII y a principios del XVIII, Suiza fue el lugar de nacimiento de muchas de las figuras más importantes de la matemática de la época. Se puede mencionar la obra del clan de los Bernoulli, así como la de Hermann, uno de sus protegidos suizos, pero el matemático más destacado que produjo Suiza durante esta época (o en cualquier otra de la historia) fue Leonhard Euler (1707-1783), que nació en Basilea. El padre de Euler era un pastor calvinista que, lo mismo que el padre de Jacques Bernoulli, esperaba que su hijo siguiera también el camino del sagrado misterio. El muchacho, sin embargo estudió con Jean Bernoulli junto a sus hijos Nicolás y Daniel, y en este ambiente favorable descubrió su vocación. El viejo Euler también tenía una buena preparación matemática, habiendo sido discípulo de Jacques Bernoulli en su juventud, y colaboró en la instrucción de su hijo en los elementos básicos de la matemática, a pesar de mantener la esperanza de que Leonhard siguiese una carrera teológica. En cualquier caso, el joven Euler recibió una educación muy completa, ya que al estudio de la matemática se unió el de la teología, la medicina, la astronomía, la física y las lenguas orientales. Terminó brillantemente la Universidad, obtuvo el grado científico de maestro, pero no pudo encontrar trabajo, al no lograr una plaza de profesor vacante en Basilea. Primera estancia en San Petersburgo Sin embargo, la amplitud de conocimientos adquiridos le resultó muy útil cuando en 1727 recibió una invitación para trabajar en la Academia de Ciencias de San Petersburgo en Rusia, donde se encontraban desde dos años antes, trabajando como profesores de matemáticas, los hermanos Nicolás y Daniel Bernoulli. Esta importante institución había sido fundada en el año 1725 por Catalina I, siguiendo las líneas trazadas por su difunto esposo Pedro el Grande, aconsejado por Leibniz. Fue la primera institución científica de Rusia. Para llevar a cabo el trabajo y la preparación de los especialistas del país fueron invitados de otros países jóvenes y talentosos profesores, como los ya mencionados hermanos Bernoulli, J. Hermann que había sido antes profesor en Padua y después en Frankfurt del Oder. Finalmente llegó Euler.

59. Euler's Contribution To Number Theory leonhard euler and His Contribution to Number Theory. Jamie Bailey leonhard euleris considered by many to be the most prolific mathematician in history http://sweb.uky.edu/~jrbail01/euler.htm

Leonhard Euler and His Contribution to Number Theory Jamie Bailey Email: jbailey@writeme.com e, i, f(x), and sigma for summations. He also made significant contributions to differential calculus, mathematical analysis, and number theory, as well as optics, mechanics, electricity, and magnetism. Euler developed the function, which is defined as the number of positive integers not exceeding m that are relatively prime to m. For example, would equal: with(numtheory); phi(7); So, when p is a prime number. Using this and Fermat's Theorem, the Euler-Fermat Theorem can be derived as follows: Fermat's Theorem (Fermat's Little Theorem) states if p is prime and a is a natural number, then ). If p does not divide a , then there exists a smallest d such that ) and d divides p - 1 . Therefore, ). Since when p is prime, the Euler-Fermat Theorem states that , if . In order to prove the Euler-Fermat Theorem, it is necessary to prove the first assertion that ), when p is prime and a is a natural number. So, the problem is to prove Fermat's Little Theorem. Proof: Suppose . It is necessary to show p )). Using the Binomial Theorem

60. Euler, Leonhard euler, leonhard. (17071783). The greatest mathematician of the eighteenth century,leonhard euler was born in Basel, Switzerland. http://srv5.fountainheadcollege.com/studentweb/chris.harvey/ws201/hw1/euler.htm

Euler, Leonhard The greatest mathematician of the eighteenth century, Leonhard Euler was born in Basel, Switzerland. There, he studied under another giant of mathematics, Jean Bernoulli . In 1731 Euler became a professor of physics and mathematics at St. Petersburg Academy of Sciences. Euler was the most prolific mathematician of all time, publishing over 800 different books and papers . His influence was felt in physics and astronomy as well. Euler's work on mathematical analysis, Introductio in analysin infinitorum (1748) remained a standard textbook for well over a century. For the princess of Anhalt-Dessau he wrote (1768-1772), giving a clear non-technical outline of the main physical theories of the time. One can hardly write mathematical equations without copying Euler. Notations still in use today, such as e and , were developed by Euler. He is perhaps best known for his research into mathematical analysis. Euler's formula: cos( x i sin(x) = e (ix) demonstrates the relationship between analysis, trignometry and imaginary numbers, in one beautiful and elegant equation. Leonhard Euler died in 1783, leaving behind a legacy perhaps unmatched, and certainly unsurpassed, in the annals of mathematics.

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