Number Theory


Pythagoras, Ellipse & Fermat

Authors: Stefan Bereza

The paper presents an attempt to solve a 300-year-old mathematical problem with minimalistic means of high-school mathematics 1]. As introduction, the Pythagorean equation of right angle triangles a^2 + b^2 = c^2 inscribed in the semicircle is reviewed; then, in an analogue way, the equation a^3+ b^3= c^3 (and then a^n + b^n = c^n) represented by a triangle inscribed in the (vertical) ellipse with its basis c making the minor axis of the ellipse and the sides of the triangle made by the factors {a,b}. Should the inscribed triangles a^3 + b^3 = c^3(and then a^n + b^n = c^n) represent the integer equations - with {a, b, c, n} positive integers, n > 2 - their sides must be rational to each other; they must form so called integer triangles. In such triangles, the square of altitude y^2(or the altitude y) must be rational to the sides. An assumption is made that at least one of the inscribed triangles may be an integral one. A unit is derived from c by dividing it by a natural number m; if the assumption is true, the unit will measure (= divide) y^2(or y) without leaving an irrational rest behind. The value of y^2(or y) is taken from the equation of the ellipse. Conducted calculations show that y^2(or y) divided by the unit leave always an irrational rest behind incompatible with c; this proves that y^2(or y) is irrational with the basis c what excludes the existence of the assumed integral triangles and, in consequence, of the discussed integral equations.

Comments: 7 Pages.

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Submission history

[v1] 2018-05-09 15:00:03

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