Tuesday, January 25, 2011

3.3, Due on January 26

Difficult:
I thought the beginning of the chapter was very difficult. I got confused with all the relabeling and and new notation of the bars. I also have a hard time remembering what injective and surjective means and how to prove that a function is injective and surjective. I think the most difficult part of this section for me will be to use the notation and to show injectivity and surjectivity of functions.

Connections:
I remember proving that something is injective, surjective, and bijective in my 290 and 341 classes, but I never really understood what it means, especially how to prove it, and to know if you have actually proved it. I have seen the function notation and read the definitions of these things many times, but I always have a hard time remembering them. So hopefully I will be able to remember what I had been taught and be able to create proofs using some of my previous knowledge of injectivity and surjectivity.

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