I am trying to find a general explanation:
1. how to construct matrix representation of Relation (R) could be (given sets and R between thm)
2. what is R reflexive, irreflexive, symmetric, anti-symmetric, transitive
3. wheteher R is an equivalence or partial order relation
4. what a co-domain is
5. what is well defined function
6. what are composite functions

Could anyone recommend a place to learn about it, with simple explanations?.. Any help greatly appreciated!!