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Sum of squares function
From Number
Revision as of 22:51, 2 May 2009 by Vipul(talk | contribs)(Created page with '==Definition== Suppose <math>n</math> and <math>k</math> are natural numbers. The '''sum of squares function''' <math>r_k(n)</math> is defined as the number of ways <math>n<...')
Suppose and are natural numbers. The sum of squares function is defined as the number of ways can be expressed as a sum of squares, counting different signs and different permutations as different ways.
