Geometry, Relativity and the Fourth DimensionCourier Corporation, 8. juni 2012 - 160 sider This is a highly readable, popular exposition of the fourth dimension and the structure of the universe. A remarkable pictorial discussion of the curved space-time we call home, it achieves even greater impact through the use of 141 excellent illustrations. This is the first sustained visual account of many important topics in relativity theory that up till now have only been treated separately. |
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... geodesics of the surface . A geodesic line on a curved surface is a line that is as straight as possible , the kind of line you get if you pull a thread ( which cannot snap out of the surface ) taut on the surface . The great circles ...
... geodesics ( that is , lines that are as short as possible ; in general , on any surface one can find the geodesic between P and Q by stretching a thread from P to Q so that the thread lies entirely on the surface and is as taut as ...
... geodesics ! A stretched string will be along a geodesic line that is also a " straight line . " Swinging a string around will produce a closed curve that satisfies the definition of a circle , although this curve will not resemble a ...
... geodesics , as usual . The Saddle is a model of the first four Postulates plus the " many - parallels postulate , ” just like the Flat Saddle . X Fig . 52 . The difficult question is whether the Saddle is isomorphic to the Flat Saddle ...
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