Quadratic Forms vs. Metric Tensors: A Foundational Comparison
Year: 2025
Type: article
Abstract: This paper revisits the distinction between quadratic forms and metric tensors. In threedimensional Euclidean geometry, quadratic forms and metrics coincide only in Cartesian coordinates, while in other orthogonal coordinate systems Lamé coefficients must be introduced. By contrast, in Gauss surface geometry quadratic forms alone cannot represent intrinsic curvature; the induced metric is required. We argue that the metric tensor should be interpreted as an invariant property of space, encoding local homogeneity or inhomogeneity and determining curvature.
Authors: Rimsha, Viktoras, Rimsha, Laimontas
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7083622642
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