What was the most difficult part of the material for you?
Working backwards through the Euclidean algorithm to find the explicit representation x,y satisfying ax + by = gcd(a,b) can be a little difficult to keep track of. I found it interesting that the book gave another possible algorithm.
What was the most interesting part of the material?
I enjoyed the introduction of fraction notation into modular arithmetic. I have not seen it before, but it makes a lot of sense and will help in simplifying notation.
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