Elliptic Curves, Algebraic Geometry Approach in Gravity Theory and Uniformization of Multivariable Cubic Algebraic Equations

TL;DR

This paper explores algebraic equations in gravity theory using algebraic geometry and uniformization techniques, proposing new methods for parametrizing multivariable cubic equations that could lead to novel solutions of Einstein's equations.

Contribution

It introduces a new approach to parametrize multivariable cubic algebraic equations in gravity using uniformization, extending elliptic function methods to higher dimensions.

Findings

Existence of algebraic equations of degree up to tenth in gravity theory.

A new notion of 'embedded sequence of cubic algebraic equations' for parametrization.

Solution of differential systems leading to uniformization functions.

Abstract

Based on the distinction between the covariant and contravariant metric tensor components in the framework of the affine geometry approach and the s.c. "gravitational theories with covariant and contravariant connection and metrics", it is shown that a wide variety of third, fourth, fifth, seventh, tenth- degree algebraic equations exists in gravity theory. This is important in view of finding new solutions of the Einstein's equations, if they are treated as algebraic ones. Since the obtained cubic algebraic equations are multivariable, the standard algebraic geometry approach for parametrization of two-dimensional cubic equations with the elliptic Weierstrass function cannot be applied. Nevertheless, for a previously considered cubic equation for reparametrization invariance of the gravitational Lagrangian and on the base of a newly introduced notion of "embedded sequence of cubic algebraic equations", it is demonstrated that in the multivariable case such a parametrization is also possible, but with complicated irrational and non-elliptic functions. After finding the solutions of a system of first - order nonlinear differential equations, these parametrization functions can be considered also as uniformization ones (depending only on the complex uniformization variable z) for the initial multivariable cubic equation.