Canonical Lattices of Integer Relations Associated to Rational Fans: Wall Generation and a Two-Step Support Filtration

Rizwan Jahangir, Daisuke Ishii

We study the lattice $L_{\mathrm{rel}}(\hat{I}\pounds )=\ker ({\mathbb{Z}}^{\hat{I}\pounds (1)}\to N)$ of integer relations among the primitive ray generators of a rational fan $\hat{I}\pounds$, from an intrinsic,…