Dear all,(adsbygoogle = window.adsbygoogle || []).push({});

I have an example taken from the book titled "Discrete Mathematics For Computer Science" by Kenneth Bogart. In the book, page 11, example 1.2-2, it says: Write down all the functions from the two element set {1,2} to the two element set {a,b}.

I couldn't understand the reasoning behind its explanation and I can't tell the difference between the functions in algebra and calculus.

According to the book, it says there are 8 functions for the example above. Why? And how is it different from a typical function? ( Functions in algebra and calculus has an infinite number sets of numbers as their domain) I do know about that and functions in discrete mathematics has a finite sets as their domain and range, I also understand this too and so ....How did the book came to the conclusion that there are 8 functions?

Thank you,

S

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# Homework Help: Discrete Mathematics (confused and help wanted)

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