Article: Theory of everything.(Book Review)

Roger Penrose The Road to Reality: A Complete Guide" to the Laws of the Universe. Jonathan Cape, 1094 pages, 30 [pounds sterling]

The mathematical physicist and cosmologist Roger Penrose, now professor emeritus at Oxford University, is best known to mathematicians for his discovery of Penrose tiles. These are two four-sided polygons that tile the plane only in a nonperiodic way, that is, without a fundamental region that repeats periodically like the hexagonal tiling of a bathroom floor, or the amazing tesselations of the Dutch artist M. C. Escher. To everyone's surprise, including Penrose's, his whimsical tiling turned out to underlie a previously unknown type of ...

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