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REPRESENTATIONS BY QUATERNARY QUADRATIC FORMS WITH COEFFICIENTS 1, 2, 5 OR 10
Alaca, Ayse,Altiary, Mada Korean Mathematical Society 2019 대한수학회논문집 Vol.34 No.1
We determine explicit formulas for the number of representations of a positive integer n by quaternary quadratic forms with coefficients 1, 2, 5 or 10. We use a modular forms approach.