Discrete Math - 2.3.2 One-to-One and Onto Functions

Defining and determining one-to-one and onto functions.

Video Chapters:
Introduction 0:00
Injective (One-to-One) Functions 0:06
Surjective (Onto) Functions 2:46
Bijective 5:08
Bijection Practice 1 5:52
Bijection Practice 2 8:01
Up Next 10:51

Textbook: Rosen, Discrete Mathematics and Its Applications, 7e

[andonge]

Thank you for making it so simple for us! You literally save me. DM looked so scary and I was worried that I will fail my exam, now I am confident that I will pass it. Thank you for your efforts Professor Brehm!

[Daresigmally]

I was literally having a nightmare trying to understand functions but you made it 10x easier, THANK YOU from the bottom of my heart for this.

[sagewoodard]

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[melissarahman]

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[jonahrivera]

I really like this updated version, the added content clarifies a lot better than original!

[kells]

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[lovenature]

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[idc]

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[awfaihfpiawjfp]

Thank you much, like seriously, this helped so much

[uq.y]

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[clyde]

You lost me with the last question. Great content though.

[zhenquan]

wonderful, now i understand very clearly, thank you.

[karinablanchard]

@10:39 I think u meant to say onto no?

[universal]

Suppose let function is x^2 what if -2 and 2 both maps to 4 in co domain... -2 and 2 are different numbers but maps to same value. You said if two values from domain maps to same value in co domain then those 2 values in domain must be same which is not in this case

Edit : what the hell. I think youu read people's mind. Within a minute of posting the question, my doubt is solved in later video.

[personalitiesfromdifferent]

Why you can't? Let me ask why can't?