(1) |

(2) |

(3) |

(4) |

**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.

© 1996-9

1999-05-26