Number Theory

0912 Submissions

[3] viXra:0912.0043 [pdf] replaced on 21 Dec 2009

Imanol's Numbers

Authors: Imanol Pérez
Comments: 2 Pages.

Imanol's numbers are those that the sum of their digits is 2, 3, 5, 6, 8 or 9.
Category: Number Theory

[2] viXra:0912.0040 [pdf] submitted on 18 Dec 2009

Expansión (1/x+2/x.......+a/x)n

Authors: Imanol Pérez
Comments: 2 Pages. In Spanish

Expansion of (1/x+2/x.......+a/x)n
Category: Number Theory

[1] viXra:0912.0030 [pdf] submitted on 12 Dec 2009

Diophantine Equation 1N + 2N + ...+ (M 1)N +MN = (M + 1)N

Authors: Arkoprobho Chakraborty
Comments: 13 pages.

Erdos had conjectured that the equation of the title had no solutions in natural numbers except the trivial 11 + 21 = 31. Moser (1953) had shown that there are no solutions for M+1 < 10106. Butske et al (1993) had further shown that there are no solutions for M+1 < 9.3x106. In this paper I show that a solution to this equation cannot exist for any value of M > 2 hence proving Erdos' conjecture. This is achieved using elementary number theoretic methods employing congruences and well-known identities.
Category: Number Theory