New posts in Lattice Orders

Completeness of a quantifier-free axiomatization of Boolean algebra using partial-ordering

Upper and lower bound in distributive lattice

No group has $\mathbf{N}_5$ as its lattice of subgroups

Structures with $x*(y*z) = y*(x*z)$

lattice of subgroup

What do the Hurwitz quaternions have to do with the Hurwitz quaternion order?

A Lattice that is not a Complete Lattice

When is a join semilattice not a meet semilattice?

How many different functions we have by only use of $\min$ and $\max$?

What is a "lattice" in set theory???