Springer Math,
Freely access this chapter from the #BookoftheWeek - A Pythagorean Introduction to Number Theory https://bit.ly/2HgqpqF
A Pythagorean Introduction to Number Theory
Overview of attention for book
Table of Contents
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Altmetric BadgeBook Overview
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Altmetric BadgeChapter 1 Introduction
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Altmetric BadgeChapter 2 Basic number theory
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Altmetric BadgeChapter 3 Integral solutions to the Pythagorean Equation
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Altmetric BadgeChapter 4 What integers are areas of right triangles?
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Altmetric BadgeChapter 5 What numbers are the edges of a right triangle?
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Altmetric BadgeChapter 6 Primes of the form $$4k+1$$
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Altmetric BadgeChapter 7 Gauss Sums, Quadratic Reciprocity, and the Jacobi Symbol
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Altmetric BadgeChapter 8 Counting Pythagorean triples modulo an integer
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Altmetric BadgeChapter 9 How many lattice points are there on a circle or a sphere?
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Altmetric BadgeChapter 10 What about geometry?
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Altmetric BadgeChapter 11 Another proof of the four squares theorem
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Altmetric BadgeChapter 12 Quadratic forms and sums of squares
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Altmetric BadgeChapter 13 How many Pythagorean triples are there?
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Altmetric BadgeChapter 14 How are rational points distributed, really?