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Marcus du Sautoy: Symmetry, reality's riddle

Marcus du Sautoy: Symmetry, reality's riddle

Podcasts - A Brief History of Mathematics Math Posters In all cases you can get the source files and modify them to make more (interesting / colorful / ...) mathematics and/or science posters. If you are inspired to do so, please post them online, link to this page and email me (jipsen(AT)chapman.edu). Comments / Questions / Requests source source source source source source source source source source source source source source source source source source source The Mathematical Moments posters from the AMS may also be of interest. See Johnny Lin's Math and Science Posters Guide for lots of links to many other posters.

Documentário: A História Da Matemática | Blog do Professor de Matemática Esta série memo­rá­vel apre­sen­tada pelo pro­fes­sor Mar­cus du Sau­toy da Uni­ver­si­dade de Oxford, leva-nos numa via­gem que o irá levar atra­vés dos tem­pos e à volta do mundo a paí­ses como o Egipto, a China, a Índia, a Rús­sia, o Médio Ori­ente a Europa e os Esta­dos Uni­dos da Amé­rica. Os epi­só­dios desta série ambi­ci­osa ofe­re­cem expli­ca­ções cla­ras e aces­sí­veis de ideias mate­má­ti­cas impor­tan­tes, mas tam­bém nos conta his­tó­rias cati­van­tes, por­me­no­res bio­grá­fi­cos fas­ci­nan­tes e epi­só­dios cen­trais nas vidas dos mai­o­res mate­má­ti­cos. Inte­res­sante, escla­re­ce­dora e diver­tida, esta série ofe­rece aos espec­ta­do­res vis­lum­bres novos e extra­or­di­ná­rios rela­ti­va­mente à impor­tân­cia da Mate­má­tica, esta­be­le­cendo esta dis­ci­plina como um dos mai­o­res fei­tos cul­tu­rais da Humanidade. A His­tó­ria da Mate­má­tica (The story of maths) foi esco­lhido como Melhor Docu­men­tá­rio pro­du­zido, no ano de 2009, pela esta­ção BBC, em votação.

The pulling power of chaos What is the most efficient way to get a space probe to its target? When Apollo 11 went to the moon in 1969 it followed a conventional Hohmann transfer orbit. Imagine an egg-shaped outline, with the earth at the bottom. As the spacecraft comes up the left-hand side, it burns fuel to accelerate, and swings into orbit around the moon. This was the quickest route – aside from the impractical one of flying straight out by burning fuel the whole time – and, in a manned mission, speed was of the essence. Trajectories such as this exploit the slingshot effect, in which the spacecraft steals energy from a planet. The technique was first used in 1991. It sounded crazy, but Belbruno knew a way to do it. One place where chaotic orbits can arise is somewhere called the “L1 Lagrange point” between the earth and the moon, where the net gravitational force is zero (essentially, objects are “suspended” between the two bodies because of the forces generated by each). The first Oscar

cgi-bin Matrix Solver Solving a linear equation system of up to 20 unknowns. If you need some help please scroll down to the example. If not, fill the 2 boxes below , then click on the "Go" button. Example As an example, let's say you have the following 3 equations to solve for the unknowns x , y , and z : 2x + 3y + 1/3z = 10 3x + 4y + 1z = 17 2y + 7z = 46 To enter the above system into the matrix solver you enter the number "3" into the small box for the number of unknowns/equations. Into the big box for the coefficients you enter the following numbers : 2 3 1/3 1.0e+1 3 4 1 17 0 2 7 46.0 Notice that each row represents one equation. Note, that for the coefficients you may enter either whole numbers ( like 2 ), fractions of whole numbers ( like 1/3 ), numbers with a decimal point ( like 46.0 ), or numbers in scientific notation ( 1.0e+01 which is the same as 10 ). After entering all numbers click on the "Go" button. You may check the solution : Which checks out.

BLOG DO TIÃO / DESAFIOS Animation reveals the world's hidden equations MacGregor Campbell, contributor Although they don't actually exist in the physical world, our most powerful tools could be mathematical equations. They underlie much of modern technology, from radio to power generation, to photo compression and electronic musical instruments. In our latest animated explainer, we look at how the wave equation, Maxwell's equations and the Fourier transform came to rule the modern world. To find out more, read our full-length feature, "Seven equations that rule your world". For more mathematics-related viewing check out our archive of One-Minute Mathvideos, or watch our previous animations to find out, for example, if supersymmetry could explain everything or why there is no such thing as empty space. Our choice of Maxwell's equations In our feature "Seven equations that rule your world", author Ian Stewart uses Maxwell's equation for electromagnetic waves propagating in a vacuum.

The Thirty Greatest Mathematicians Click for a discussion of certain omissions. Please send me e-mail if you believe there's a major flaw in my rankings (or an error in any of the biographies). Obviously the relative ranks of, say Fibonacci and Ramanujan, will never satisfy everyone since the reasons for their "greatness" are different. Following are the top mathematicians in chronological (birth-year) order. Earliest mathematicians Little is known of the earliest mathematics, but the famous Ishango Bone from Early Stone-Age Africa has tally marks suggesting arithmetic. Early Vedic mathematicians The greatest mathematics before the Golden Age of Greece was in India's early Vedic (Hindu) civilization. Top Thales of Miletus (ca 624 - 546 BC) Greek domain Thales was the Chief of the "Seven Sages" of ancient Greece, and has been called the "Father of Science," the "Founder of Abstract Geometry," and the "First Philosopher." Apastambha (ca 630-560 BC) India Pythagoras of Samos (ca 578-505 BC) Greek domain Tiberius(?)

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