関連ワード:  what is a relation discrete math    what is a discrete relationship in math    what is a binary relation in discrete mathematics    what is a recurrence relation in discrete mathematics    what is relation in discrete mathematics with examples    what is an equivalence relation discrete math    what is relation in discrete mathematics and give the different properties of it    what is reflexive relation in discrete mathematics    what is antisymmetric relation in discrete mathematics    what is symmetric relation in discrete mathematics