English

Fermat's Last Theorem admits an infinity of proving ways and two corollaries

General Mathematics 2015-07-28 v1

Abstract

Fermat's statement is equivalent to say that if xx, yy, zz, nn are integers and n>2n>2, then znxn+ynz^{n}\gtrless x^{n}+y^{n}. This is proved with the aid of numbers λ\lambda 's, of the form λ=z/ρ\lambda =z/\rho , with 1<ρ<z1<\rho<z, named \emph{reversors} in the text, because their property of multiplying zn1z^{n-1} in zn1<xn1+yn1z^{n-1}<x^{n-1}+y^{n-1}, not only reverses the signal but also gives zn>xn+ynz^{n}>x^{n}+y^{n} as a solution of the reversed inequality. As the λs\lambda ^{\prime }s satisfy a compatible opposed sense system of inequalities, the λ\lambda-set is equivalent to the points of an R+\mathbb{R}^{+} interval. Therefore the theorem admits a noncountable infinity of proving ways, each one given by a particular value of λ\lambda. In Corollary 1 a general relation between yy, xx, zz and nn is derived. Corollary 2 shows that the Diophantine equation in Fermat's statement admits no solutions other than algebraic irrationals and the inherent complexes. Integer triplets can be classified in seven sets, within each one their relation with the respective nn is the same as shown in Table 1. Numerical verification with examples taken from all the mentioned seven sets gives a total agreement with the theory.

Keywords

Cite

@article{arxiv.1507.06989,
  title  = {Fermat's Last Theorem admits an infinity of proving ways and two corollaries},
  author = {José Cayolla},
  journal= {arXiv preprint arXiv:1507.06989},
  year   = {2015}
}