Combinatorics / CONCEPT

The extinction set of the wheel W_18 contains 4

In the Mukwembi model of HIV infection on the wheel W_18 with replacement parameter R = 4, every admissible initial state reaches the all-healthy state by time 25, so 4 belongs to the extinction set of W_18 and Conjecture 1 of Espinosa-Garcia et al., which puts that set equal to {3} together with all R >= 17, is false.