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1.
Let p be a large prime number, K, L, M, λ be integers with 1 ≤ M ≤ p and gcd(λ, p) = 1. The aim of our paper is to obtain sharp upper bound estimates for the number I
2(M; K, L) of solutions of the congruence
xy o l (mod p), K+ 1 £ x £ K +M, L+ 1 £ y £ L +M,xy \equiv \lambda \quad ({\rm mod} p), \quad K+ 1 \leq x \leq K +M,\quad L+ 1 \leq y \leq L +M, 相似文献
2.
We consider the Hill operator
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