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Lagrange four-square theorem
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Mathematics
Area of mathematics
Number theory
Created
2026-09-24
Updated
2026-09-24
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The Lagrange four-
square
theorem
says that every nonnegative
integer
is
a
sum
of four
integer
squares
.
Ancestors
(4)
Number theory
Area of mathematics
Mathematics
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Past exam of the mathematics course of the University of Cambridge
/
2025
/
iii
/
Paper 120
/
3
/
f
/
Solution
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