Congruence properties of self-contained balanced sets
Hansraj Gupta · Proceedings of the Edinburgh Mathematical Society · 1939
Let the set b1b2, b3, …., bk; of k non-negative integers be denoted by Bk. Let ξ;Bk denote the set ξb1 ξb2, ξb3, …. ξbk; ξ being any integer > 1. Without loss of generality, we can suppose that b ≦bi+1.