Section 24

This section made a lot of sense to me. The definition of function doesn't seem drastically different than what it was in calculus. I could see how it would be a little bit tricky to apply this definition to congruence classes and sets rather than just to real numbers, but I think it's not too bad so far. This more technical definition also helped me understand more in depth about how functions work and are defined.

I didn't really understand what the characteristic function meant. I'm sure it will be simple when it's explained in class, but other than that the section wasn't too difficult to grasp.

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