Application of Cantor pairing function in the two simplest tasks

Abstract

In this paper application of Cantor pairing function is considered in solving the following two problems. 1. In determining the main Pythagorean triples. 2. When calculating the sum of the digits of n-digit numbers in the decimal number system. When calculating the sum of digits of all unequivocal to n-digit numbers in the decimal number system. For these two problems program was written in the programming language Borland Delphi 7.