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Minkowski's bound : ウィキペディア英語版 | Minkowski's bound In algebraic number theory, Minkowski's bound gives an upper bound of the norm of ideals to be checked in order to determine the class number of a number field ''K''. It is named for the mathematician Hermann Minkowski. ==Definition== Let ''D'' be the discriminant of the field, ''n'' be the degree of ''K'' over , and be the number of complex embeddings where is the number of real embeddings. Then every class in the ideal class group of ''K'' contains an integral ideal of norm not exceeding Minkowski's bound : Minkowski's constant for the field ''K'' is this bound ''M''''K''.〔Pohst & Zassenhaus (1989) p.384〕
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