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Ten-Twenty-One: {3.2 Cont'd. Working with Quantifiers. Part 2: Functions}

(After discussing this in class, it all makes much more sense to me. So I went back and corrected some GYHD that I did wrong before. 547 more words


Groups Lecture 3

in which we meet group homomorphisms.

As a small add-on from last time, we started by proving that the subgroups of the integers are exactly the sets of multiples . 511 more words