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जब भी उठेंगे तूफ़ान बनकर उठेंगे,अभी उठने की ठानी नहीं है…

Lecture - 1 Relations and Functions

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.

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