Estimates for complete exponential sums of special types
This paper is concerned with the exponential sums
and with Heilbronn's type exponential sums
where (and below) p is prime, m, n, a and b are integers with m > n > 0 and p [nmid] ab, and er(x) = exp(2πix/r) as usual.(Received January 4 2000)
(Revised May 9 2000)
1 Project supported by the National Natural Science Foundation of China.