How to restrict a quadratic form to a sublattice

asked 2012-11-14 16:12:29 +0200

Paul Johnson gravatar image

updated 2019-08-29 18:36:23 +0200

FrédéricC gravatar image

If I have quadratic form, is there an easy way to find what the quadratic form is when restricted to a (finite index) sublattice?

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