Two linear orderings of a same set are perpendicular if every self-mapping of this set that preserves them both is constant or the identity. Two isomorphy types of linear orderings are …
A convex geometry is a closure space satisfying the anti-exchange axiom. For several types of algebraic convex geometries we describe when the collection of closed sets is order …
M Couceiro, L Haddad, M Pouzet - 2019 IEEE 49th …, 2019 - ieeexplore.ieee.org
The mathematics of Ivo Rosenberg Page 1 The mathematics of Ivo Rosenberg Dedicated to the memory of Professor Ivo Rosenberg. Miguel Couceiro ∗ , Lucien Haddad † , Maurice Pouzet ‡ …