Pictured: Pondering the smallest lattice not yet known to be a congruence lattice of any finite algebra.

Three Legends of Universal Algebra and Lattice Theory,

• Ralph Freese,
• Bill Lampe, and
• JB Nation,

worked most of their careers at the University of Hawai’i at Manoa.

They all will be approximately 70 years old in May 2018, and a conference, ALH-2018, was organized by PhD alumnus William DeMeo and others to celebrate their achievements.