|Covid-19|Stone algebra Wikipedia
In mathematics, a Stone algebra, or Stone lattice, is a pseudo-complemented distributive lattices such that a* ∨a** = 1. They were introduced by Grätzer & Schmidt (1957) and named after Marshall Harvey Stone.
Boolean algebras are Stone algebras, and Stone algebras are Ockham algebras.
Examples:The open-set lattice of an extremally disconnected space is a Stone algebra.
The lattice of positive divisors of a given positive integer is a Stone lattice.