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Home Science News Mathematics

Mathematician Cracks Algebra’s Oldest Problem with Innovative New Number Sequences

May 1, 2025
in Mathematics
Reading Time: 4 mins read
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Norman Wildberger at his laptop.
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A groundbreaking development has emerged from the halls of UNSW Sydney’s mathematics department, as Honorary Professor Norman Wildberger has unveiled a novel approach to an age-old mathematical dilemma: solving higher-degree polynomial equations. This advancement challenges long-held assumptions dating back nearly two centuries and promises to revolutionize how mathematicians and scientists approach complex polynomial problems.

Polynomials, expressions involving variables raised to various powers, are foundational across numerous scientific and engineering domains. While quadratic equations (degree two) have well-established solutions known since antiquity, higher-degree polynomials—particularly those of degree five and above—have stubbornly resisted general algebraic solutions using radicals. The innovative framework introduced by Wildberger offers a fresh perspective, bypassing traditional radical-based methodologies altogether.

Historically, solutions for polynomials up to degree four were formulated by exploiting radicals—roots extracted from numbers, like square roots and cube roots—to express answers exactly. However, in 1832, the brilliant French mathematician Évariste Galois demonstrated that general solutions for quintic or higher-degree polynomials could not be expressed using radicals due to intrinsic algebraic complexities linked to symmetry groups. This revelation effectively closed the book on radical-based general formulas for these polynomials, relegating solutions to approximate or numerical methods.

Professor Wildberger’s approach diverges sharply from this classical viewpoint. Central to his philosophy is a rejection of radicals and the irrational numbers they often generate. These irrational numbers, including decimals that extend infinitely without repetition, present a conceptual challenge since they cannot be fully represented in a finite form and rely on problematic notions of infinity. Wildberger’s prior contributions to mathematics, such as rational trigonometry and universal hyperbolic geometry, are underpinned by a similar skepticism towards these infinite constructs, favoring instead algebraic operations that remain within the realm of rationality.

In this new work, Wildberger, alongside computer scientist Dr. Dean Rubine, introduces an alternative framework grounded in infinite power series expansions. Power series allow polynomials to be extended into infinite sums with terms raised to increasing powers of the variable. Crucially, by truncating these series, the approach approximates solutions with high precision while maintaining algebraic integrity, avoiding irrational numbers altogether.

Testing their method on classical equations, including a notable cubic studied by John Wallis in the seventeenth century to illustrate iterative root-finding methods, Wildberger reports excellent agreement between theoretical predictions and numerical approximations. This success signals not only practical utility but also theoretical robustness in this new realm of polynomial solving.

Beyond the mechanics of series expansions, the core of this breakthrough resides in a deep combinatorial structure. Wildberger’s insight stems from extending well-known number sequences—specifically, the Catalan numbers, a central sequence in combinatorics linked to counting polygon triangulations—into what he terms the “Geode.” This new multi-dimensional array encapsulates intricate relationships among the ways polygons can be dissected via non-crossing partitions, thereby generalizing classical sequences into powerful tools capable of capturing polynomial solutions of arbitrary degree.

The Catalan numbers have long been celebrated in mathematics for permeating diverse fields, including computer science algorithms, biological models of RNA folding, and game theory. Yet, their direct connection to quadratic equations has been known only superficially before now. Wildberger’s work reveals that finding higher-dimensional analogues of these sequences provides the missing keys to unlocking general polynomial solutions, thereby reshaping a fundamental chapter in algebra.

This discovery not only challenges entrenched algebraic doctrines but also lays fertile ground for fresh computational methodologies. By programming computers to deploy algebraic series grounded in the Geode array, software can now potentially solve complex polynomial equations without relying on approximate numerical methods based on irrational quantities. Such an approach promises increased precision and logical consistency across applications spanning physics, engineering, and beyond.

While the theoretical underpinnings are profound, Wildberger acknowledges that this is just the commencement of a larger journey, as the Geode array invites extensive investigation. The rich combinatorial landscape it opens leads to numerous tantalizing questions and challenges, ensuring mathematicians will be engaged with the topic for years to come.

This pioneering research, scheduled for publication in the American Mathematical Monthly in May 2025, stands as a milestone in the ongoing quest to understand polynomial equations more profoundly. It symbolizes how revisiting classical problems through fresh lenses—eschewing outdated assumptions and embracing novel mathematical constructs—can yield transformative insights.

Wildberger’s rejection of irrational numbers and infinite decimals may be contentious among traditionalists but underscores the vitality of challenging foundational concepts in mathematics. By promoting mathematical logic and exactness, his methods could inspire a renaissance in algebraic thought and computational practice.

Ultimately, this hyper-Catalan series solution and the introduction of the Geode array provide not only a remarkable solution to polynomials of any degree but also a new vista for exploring the profound connections between algebra, geometry, and combinatorics. The implications reach far beyond academia, promising advancements in algorithm design, data science, and the modeling of complex natural phenomena.

As the mathematical community delves into this groundbreaking work, the excitement is palpable. Wildberger’s contribution is poised to transform a “closed book” into an open field of discovery, redefining how we perceive and solve the ancient yet ever-relevant challenge of higher-degree polynomial equations.


Subject of Research: Not applicable

Article Title: A Hyper-Catalan Series Solution to Polynomial Equations, and the Geode

News Publication Date: Not explicitly stated (original article publication date: 1-May-2025)

Web References: http://dx.doi.org/10.1080/00029890.2025.2460966

References: Wildberger, N., & Rubine, D. (2025). A Hyper-Catalan Series Solution to Polynomial Equations, and the Geode. American Mathematical Monthly. DOI: 10.1080/00029890.2025.2460966

Image Credits: UNSW Sydney

Keywords: polynomial equations, higher degree polynomials, quintic equations, radicals, irrational numbers, power series, combinatorics, Catalan numbers, Geode array, algebraic solutions, computational mathematics, mathematical logic

Tags: algebraic complexities and symmetrybreakthrough in algebraGalois theory implicationshigher-degree polynomial equationshistory of polynomial solutionsinnovative number sequencesmathematical advancements in problem-solvingNorman Wildberger contributionsradical-based methodologies in mathematicsrevolutionizing complex polynomial problemssolving polynomials without radicalsUNSW Sydney mathematics department
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