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math.RA2015
New-from-old full dualities via axiomatisation
Brian A. Davey, Jane G. Pitkethly, Ross Willard
We clarify what it means for two full dualities based on the same algebra to be different. Our main theorem gives conditions on two different alter egos of a finite algebra under w…
math.RA2015
Counting relations on Ockham algebras
Brian A. Davey, Long T. Nguyen, Jane G. Pitkethly
We find all finite Ockham algebras that admit only finitely many compatible relations (modulo a natural equivalence). Up to isomorphism and symmetry, these Ockham algebras form two…