📚 Recommended Mathematics Books

Topology (Munkres)  |  General Topology (Engelking)  |  Counterexamples in Topology  |  Rudin's Analysis

As an Amazon associate, I earn from qualifying purchases.

I found an example of a discrete funcoid which is not a complemented element of the lattice of funcoids. Thus the set of discrete funcoids is not the center of the lattice of funcoids, as I conjectured earlier.

See the Appendix “Some counter-examples” in my article “Funcoids and Reloids”.

The example is simple diagonal relation.