Abstract Algebra 7: Composition of functions

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Abstract: We briefly describe how to compose two functions. If function f maps from set A to set B, and if function g maps from set B to set C, then their composition maps from set A to set C.

This video accompanies the class "Introduction to Abstract Algebra" at Colorado State University:
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Third night in a row I'm watching these lessons. Some of those remind me on elementary school, especially the sets, but I can see there are some way abstract concepts kicking in, so can't wait to view more of these videos. Thanks for uploading them!

DaSein