लहरों का शांत देखकर ये मत समझना,की समंदर में रवानी नहीं है,
जब भी उठेंगे तूफ़ान बनकर उठेंगे,अभी उठने की ठानी नहीं है…
Logics for this lecture:
Relation \subseteq Cartesian Product
Relation on set A is defined as R \subseteq A \times A
\phi and A \times A are two extreme subsets of A \times A
If R = \phi , then relation is called empty relation.
If R = A \times A , then relation is called universal relation.
Both empty and universal relations are also known as trivial relations.
