(1) |
(2) |
(3) |
(4) |
See also Gaussian Sum
References
Duke, W. ``Some Old Problems and New Results about Quadratic Forms.'' Not. Amer. Math. Soc. 44, 190-196, 1997.
Hardy, G. H. and Wright, E. M. An Introduction to the Theory of Numbers, 5th ed. Oxford, England: Clarendon Press, p. 56,
1979.
Katz, N. M. Gauss Sums, Kloosterman Sums, and Monodromy Groups. Princeton, NJ: Princeton University Press, 1987.
Kloosterman, H. D. ``On the Representation of Numbers in the Form
.'' Acta Math.
49, 407-464, 1926.
Ramanujan, S. ``On the Expression of a Number in the Form
.'' Collected Papers. New York: Chelsea, 1962.