lattice theory

noun3

1. •
   The branch of mathematics concerned with lattices (partially ordered sets).

   • Apart from an introduction of effective techniques, a most significant contribution of our work has been the elevation of lattice theory in computational intelligence – soft computing. — 2006
2. •
   A lattice model, a mathematical model based on a lattice (discrete subgroup of Rⁿ); the study of such models.
3. •
   (A) lattice gauge theory.

   • It is natural to think that the absence of phase transitions in the SU(2) theory can be generalized to lattice theories with any continuous non-Abelian gauge group. — 1981