MathGloss/D/Disjoint sets

Examples
Let $$A=$$[1,2,4,7,8} and $$B=$${0,3,9,12} then $$A\cap B=\phi$$ Let $$A=$$[a,f,e,t,y,h} and $$B=$${v,b,n,m,j,r} then $$A\cap B=\phi$$ Let $$A=$$[multiples of 2 which are less than 64} and $$B=$${multiples of 7 greater than 60} then $$A\cap B=\phi$$