What was the most interesting part of the material for you?
I liked learning about one-to-one functions because from calculus I remember that the inverse of a one-to-one function is still a one-to-one function (when the functions are on the real numbers). It's cool that we can prove functions to be one-to-one.
What was the most difficult part of the material for you?
I didn't get the definition for surjective functions at first because I couldn't remember the relationship between codomain and image. I think an easier definition for a surjective function is when the codomain is equal to the range.
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