Suppose |A| = |B| are finite and f : A → B. Prove f is one-to-one iff f is onto (ILIEKMATHPHYSICS)

[@Seeker-bf3xq]

I am enjoying Your videos. Whenever I get time, I come here and just look into the statements and I try to prove myself. Helps me a lot in maintaining my form.

[@SATYAMJANA-xd7cv]

Superb explanation brother. By the way,where do you live???? I am watching you from India 🇮🇳❤❤❤❤❤❤

[@mikecaetano]

And for infinite sets?

[@user-nx6wi6eh9v]

This doesn't hold