Semigroups, algebraic structures defined by a set equipped with an associative binary operation, are a cornerstone within modern algebra. Their study encompasses both abstract theoretical development ...
Inflation, in the context of the big bang theory, refers to the episode of exponential expansion of the very early universe indicated by particle physics' Grand Unified Theories (Extensive references ...
WE publish this week, as a special supplement, the substance of an address by Prof. N. Bohr on the development of the theory of atomic structure, and in particular of the latest form and tendencies of ...
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