KnowraSum of squaresLinked fromLinked fromThe 6 pages that link to Sum of squares, each with the reason it gives.All 6Broader topic 1Related 3Narrower topic 2Euler's four-square identityNarrower topic: The identity is a multiplication rule for a particular four-term sum-of-squares expression.Legendre's three-square theoremNarrower topic: The theorem is a precise existence criterion for one particular number of integer squares.