Relations and their Inverses

We review the idea of a relation, and show how to express the inverse of a relation. A relation from A to B i a subset of the cartesian product A x B and we write an element in the relation as aRb to mean that a relates to b.
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[@vivianna168]

Hello Dr. Bazett,
Just wanted to say thank you for putting these out here. As an online college math major, it's really hard to find good resources that teach abstract math well. I'm doing a course called Bridge to Abstract Math, and found almost no good videos on the topic- except yours and a select few. Please keep doing videos for people like us!

[@DrTrefor]

You're most welcome, thank you!

[@ClamChowderSoup]

hello dr Trefor, by chance is the mirror image example from B to A an mistake? from the example R we have a3 to b4, but R inverse we have b4 to a2? Shouldn't it be b4 to a3 for R inverse?

[@lintz_lin]

Am thinking about the same thing

[@moeyk97]

DO MORE PLS these videos are awesome!!

[@islamians3132]

I am Pakistani your Vedio is great 🎉🎉🎉

[@itz__tanishq_official]

Hi bro I m Indian 🇮🇳

[@sajadullahteymorytani4338]

Isn't this example a functions?

[@thegeneralgamer4921]

relations are functions (mostly, he talks about that at the beginning of the video)

[@wiggles7976]

Neither relation is a function. If R gave a function from A to B, what's f(a_3)?

[@masoudsultani7803]

When did you become a doctor?

[@pcgamermofo]

thanks!