Relation R on ℕ x ℕ
((a,b),(c,d)) R <=> a+b = c+d
Ok I had to prove that R is an equivalence relation (Reflexivity, symmetry, transtitivity). I already did that. Second part is to sketch all equivalence classes of R.
I dont understand or the way to sketch it. Do I have to draw a matrix? Or a coordinate system?
A coordinate system would simply cover the whole positive area of it. But I need to sketch the CLASSES of R so I dont think I understand it the way I should. What am I overlooking?