Binary relations

https://en.wikipedia.org/wiki/Binary_relation
https://ru.wikipedia.org/wiki/Бинарное_отношение

reflexive, inreflexive
symmetric, asymmetric, antisymmetric
transitive

• Q: hw problems 220-242
  (in older homeworks 113-135)

Equivalence relations

https://en.wikipedia.org/wiki/Equivalence_relation

• Q: hw problems 243-255
  (in older 136-148)

Partial orders

• Q: hw problems 256-277