# Math Help - closure sets

1. ## closure sets

Hello!

I need help finding an example in which the closure of (A and B) is strict subset of the closure(A) and closure(B) given that A and B are subsets of R.

Thanks

2. Originally Posted by inthequestofproofs
I need help finding an example in which the closure of (A and B) is strict subset of the closure(A) and closure(B) given that A and B are subsets of R.
Consider $A=(0,1)~\&~B=(1,2)$.