Euclid's Window: The Story of Geometry from Parallel Lines by Leonard Mlodinow PDF

By Leonard Mlodinow

ISBN-10: 0684865238

ISBN-13: 9780684865232

Flatbed test: 2 ebook pages = 1 dossier web page, no OCR

via Euclid's Window Leonard Mlodinow brilliantly and delightfully leads us on a trip via 5 revolutions in geometry, from the Greek proposal of parallel traces to the most recent notions of hyperspace. here's an altogether new, fresh, substitute background of math revealing how uncomplicated questions someone may perhaps ask approximately area -- within the lounge or in another galaxy -- were the hidden engine of the top achievements in technological know-how and expertise.
Mlodinow finds how geometry's first revolution all started with a "little" scheme hatched through Pythagoras: the discovery of a procedure of summary ideas that can version the universe. That modest notion was once the foundation of clinical civilization. yet additional develop used to be halted whilst the Western brain nodded off into the darkish a while. ultimately within the fourteenth century an imprecise bishop in France invented the graph and heralded the subsequent revolution: the wedding of geometry and quantity. Then, whereas intrepid mariners have been crusing backward and forward around the Atlantic to the recent global, a fifteen-year-old genius learned that, just like the earth's floor, house may be curved. may parallel traces particularly meet? may possibly the angles of a triangle particularly upload as much as extra -- or much less -- than one hundred eighty levels? The curved-space revolution reinvented either arithmetic and physics; it additionally set the degree for a patent workplace clerk named Einstein so as to add time to the size of house. His nice geometric revolution ushered within the smooth period of physics.
this present day we're in the middle of a brand new revolution. At Caltech, Princeton, and universities worldwide, scientists are spotting that every one the numerous and wondrous forces of nature will be understood via geometry -- a unusual new geometry. it's a exciting math of additional, twisted dimensions, within which area and time, subject and effort, are all intertwined and published as outcomes of a deep, underlying constitution of the universe.
in response to Mlodinow's huge ancient study; his stories along colleagues comparable to Richard Feynman and Kip Thorne; and interviews with major physicists and mathematicians akin to Murray Gell-Mann, Edward Witten, and Brian Greene, Euclid's Window is a unprecedented combination of rigorous, authoritative research and available, good-humored storytelling that makes a stunningly unique argument announcing the primacy of geometry. should you have appeared via Euclid's Window, no house, no factor, and no time will ever be relatively an analogous.

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Extra info for Euclid's Window: The Story of Geometry from Parallel Lines to Hyperspace

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Let A(G),A(H),A(K) be the corresponding Lie algebras, and choose some ad(H)-invariant complement P of A(H) in A(G), some ad(K)-invariant complement Q of A(K) in A(H). Then any ad(H)-invariant scalar product on P gives rise to a G-invariant metric h on G/H; similarly any ad(K)-invariant scalar product on Q gives rise to a H-invariant metric on H/K. Now if g is the G-invariant metric on G/K corresponding to the scalar product on P @ Q given by the two preceding scalar products on P and Q and the condition that P and Q are orthogonal, then~rg is a Riemannian submersion from (G/K,g) onto (G/H,h) with totally geodesic fibres isometric to (H/K,k).

I-oj) i 0 Green's Assume theorem. (A) and let I max M Proof: (i) an Einstein (ai_oj)2 + nR . space, n > 3 , = fll g r a d Use do i__ n-1 Theorem. p > 0 be . f. let (M,g) be [6]. an E i n s t e i n space, n ~ 3 , R > 0 , equality . Then max ~ ~ DR . {p 6 M I f(P) M (ii) If in (i) sphere holds of iff = 0} (M,g) curvature is n o w h e r e is R and dense isometrically H ~ nR .

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Euclid's Window: The Story of Geometry from Parallel Lines to Hyperspace by Leonard Mlodinow


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