lattice is:package

Fine-grained library for constructing and manipulating lattices In mathematics, a lattice is a partially ordered set in which every two elements x and y have a unique supremum (also called a least upper bound, join, or x /\ y) and a unique infimum (also called a greatest lower bound, meet, or x \/ y). This package provide type-classes for different lattice types, as well as a class for the partial order.

Not on Stackage, so not searched. A library for lattices

Not on Stackage, so not searched. A Haskell implementation of semibounded lattices

Not on Stackage, so not searched. Semilattices

Not on Stackage, so not searched. Nested discrete event simulation module for the Aivika library using lattice