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from article Combinatorial theory
Two orthogonal Latin squares for n = 10. (Courtesy of Thomas Brylawski; Karl Petersen, photographer)
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from article Combinatorial theory
Subdivision of a square into 26 smaller squares; no two of which are the same size. (Photo courtesy of Thomas Brylawski; Karl Petersen, photographer)
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from article Riemann surface
Riemann surface for zn. (After A. G. Sveshnikov and A. N. Tikhonov, The Theory of Functions of a Complex Variable, Mir Publishers, 1973)
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from article Riemann surface
Rolling up an ideal hyperbolic square. (After W. Dyck, Ueber Untersuchen und Aufstellung von Gruppe und Irrationalität regulärer Riemann'scher Flächen, Math. Ann., 17:473–509, 1880)
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from article Mendelevium
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from article Evaporation
In a cooling tower, hot water from a mechanical process and air come in contact, causing some of the water to evaporate (absorb heat), thereby lowering the heat of the process water. (Credit: Malcolm Fife/age fotostock)
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from article Polonium
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from article Plutonium
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from article Nanostructure
Schematic of four basic types of nanostructured materials, classified according to integral modulation dimensionality. (a) Dimensionality 0: clusters of any aspect ratio from 1 to infinity. (b) Dimensionality 1: multilayers. (c) Dimensionality 2:…
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from article Nanostructure
Optical properties of cadmium sulfide (CdS) cluster assemblages. (a) Optical absorption spectra of CdS clusters in sodalite cages of zeolite Y for two different loadings compared to that for bulk CdS (micrometer size). (b) Cage structure of zeolite…
