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小草小区二区三区四区:On indefinite and potentially universal quadratic forms over number fields

小草小区二区三区四区

题目:On indefinite and potentially universal quadratic forms over number fields

作者:徐飞(教授)

简介:A number field K admits a binary integral quadratic form which represents all integers locally but not globally if and only if the class number of K is bigger than one. In this case, there are only finitely many classes of such binary integral quadratic forms over K.


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