Fixed Point Property for Finite Ordered Sets That Contain No Crowns With 6 or More Elements
Mathematics and Natural Sciences
We prove that, for a finite ordered set P that contains no crowns with 6 or more elements, it can be determined in polynomial time if P has the fixed point property. This result is obtained by proving that every such ordered set must contain a point of rank 1 that has a unique lower cover or a retractable minimal element.
Schroeder, B. S.
(2019). Fixed Point Property for Finite Ordered Sets That Contain No Crowns With 6 or More Elements. Order.
Available at: https://aquila.usm.edu/fac_pubs/16311