Titlebook: Unsolved Problems in Number Theory; Richard K. Guy Book 19942nd edition Springer Science+Business Media New York 1994 Zahlentheorie.arithm

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e von einzelnen Autoren als besondere Art bezeichnet oder in mehrere Arten getheilt wird; sie unterscheidet sich von der gemeinen Kiefer hauptsächlich durch ihre volle Benadelung, indem ihre Nadeln erst 1–2 Jahre später abfallen, als bei der gemeinen kiefer, so daß sie oft fünfjährige Nadeln trägt.

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0941-3502 ther theorists or problem solvers. Mathematics is kept alive, much more than by the activities of either dass, by the appearance of a succession of unsolved problems, both from within mathematics itself and from the increasing number of disciplines where it is applied. Mathematics often owes more to

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Introduction,f considerable technical difficulty. However, there are more unsolved problems than ever before, and though many of these are unlikely to be solved in the next generation, this probably won’t deter people from trying. They are so numerous that they have already filled more than one volume: the prese

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Additive Number Theory,chevarria has verified it up to 2., and Matti Sinisalo to 4 × 10.. Vinogradov proved that every . number greater than . is the sum of . primes and Chen Jing-Run has shown that all large enough even numbers are the sum of a prime and the product of at most two primes. Chen & Wang have reduced the num

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Nonlinear Phenomena with Ultra-Broadband Optical Radiation in Photonic Crystal Fibers and Hollow Wa based on the slowly varying envelope approximation and Taylor expansion for the refractive index can not be applied. Here a generalized theoretical approach without these approximations is used for the study of some interesting physical problems such as the generation of supercontinua and extremely

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