Zoom Lecture 6. 1 | TTU MATH 4000-Problem Solving for Putnam, Fall 2020

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Title: Number theory II (part 2)
Lecturer: Cezar Lupu, Texas Tech University

Description: In this lecture, we continue with diophantine equations and we introduce some analytic methods to solve different problems.
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For problem 2, you could have stated that -1 is not a quadratic residue mod 7 since 7 is a prime of the form 4k+3 using the lemma from the previous lecture.

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