On $n$-ADC integral quadratic lattices over algebraic number fields

Abstract

In the paper, we extend the ADC property to the representation of quadratic lattices by quadratic lattices, which we define as $ n $-ADC-ness. We explore the relationship between $ n$-ADC-ness, $ n $-regularity and $ n $-universality for integral quadratic lattices. Also, for $ n\ge 2 $, we give necessary and sufficient conditions for an integral quadratic lattice over arbitrary non-archimedean local fields to be $ n $-ADC. Moreover, we show that over any algebraic number field $ F $, an integral $ \mathcal{O}_{F} $-lattice with rank $ n+1 $ is $n$-ADC if and only if it is $\mathcal{O}_{F}$-maximal of class number one.