# Equivalence Relation help!

• May 11th 2010, 08:15 PM
angelfire80
Equivalence Relation help!
R is an equivalence relation. Find a compliant, where a is any element in the set on which the relation is defined.
Let R1 and R2 be relations on A.(Doh)
• May 12th 2010, 01:49 AM
Swlabr
Quote:

Originally Posted by angelfire80
R is an equivalence relation. Find a compliant, where a is any element in the set on which the relation is defined.
Let R1 and R2 be relations on A.(Doh)

• May 12th 2010, 10:45 AM
angelfire80
Help
If r1 and r2 are both reflexive is R1 intersect r2 reflexive? What about r1 union r2
• May 12th 2010, 11:12 AM
Plato
Quote:

Originally Posted by angelfire80
If r1 and r2 are both reflexive is R1 intersect r2 reflexive? What about r1 union r2

A relation is reflexive if and only if the relation contains the diagonal, $\Delta$.
Would the intersection contain $\Delta?$