Rational lattice

Unimodular lattice

A rational lattice 𝐿 is unimodular iff its Gram determinant |det𝐺| =1. #m/def/geo An integral unimodular lattice is said to be

• type I iff it is odd;
• type II iff it is even.

#state/develop | #lang/en | #SemBr