Question

Suppose we have a relation on a set A, i.e. A x A, where |A| = n; n a positive integer. How can we count the number of relations on set A which are reflexive, symmetric, transitive and anti-symmetric?

Answer 1

thanks but the answer would be better

Answer 2

it is in there

Answer 3

oh ok tha nks

Answer 4

on which slide is it, its 57 slides

Answer 5

this site blows