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The American Mathematical Monthly Volume 97, 1990 - Issue 2
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THE TEACHING OF MATHEMATICS

A One-Sentence Proof That Every Prime p ≡ 1 (mod 4) Is a Sum of Two Squares

D. ZagierDepartment of Mathematics, University of Maryland, College Park, MD20742
Page 144 | Published online: 11 Apr 2018

REFERENCE

  • D. R. Heath-Brown, Fermat's two-squares theorem, Invariant (1984) 3–5.

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