On two algebraic parametrizations for rational solutions of the cuboid equations

Abstract

A rational perfect cuboid is a rectangular parallelepiped whose edges and face diagonals are given by rational numbers and whose space diagonal is equal to unity. Its existence is equivalent to the existence of a perfect cuboid with all integer edges and diagonals. Finding such a cuboid or proving its non-existence is an old unsolved problem. Recently, based on a symmetry approach, the equations of a perfect cuboid were transformed to factor equations. The factor equations turned out to be solvable and, being solved, have led to a pair of inverse problems. Our efforts in the present paper are toward solving these inverse problems. Algebraic parametrizations for their solutions using algebraic functions of two rational arguments are found.

AmSTeX, 17 pages, amsppt style

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Cited by in corpus (7)

• A note on rational and elliptic curves associated with the cuboid factor equations
• A note on solutions of the cuboid factor equations
• A strategy of numeric search for perfect cuboids in the case of the second cuboid conjecture
• Asymptotic estimates for roots of the cuboid characteristic equation in the linear region
• Reverse asymptotic estimates for roots of the cuboid characteristic equation in the case of the second cuboid conjecture
• A note on invertible quadratic transformations of the real plane
• A fast modulo primes algorithm for searching perfect cuboids and its implementation