dorsal/arxiv
View SchemaThe Geometric Origin of the Cayley-Hamilton Theorem: A Constructive Proof via Dimensional Syzygy
| Authors | Xiao Wang |
|---|---|
| Categories | |
| ArXiv ID | 2601.06136vv1 |
| URL | https://arxiv.org/abs/2601.06136 |
| License | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
Abstract
We demonstrate that the Cayley-Hamilton theorem is a derived consequence of a more fundamental dimensional constraint: the syzygy formed by the tensor product of two Levi-Civita symbols, which vanishes identically in m-dimensional space. By shifting perspective from the tensor A to the isotropic operators that induce A's invariants through contraction, we reveal that the Cayley-Hamilton identity emerges when this vanishing operator acts on the m-fold tensor product of A. The intrinsic tensorial form of the theorem--invariant coefficients multiplying tensor powers--is inherited from the contraction structure rather than imposed ad hoc. We provide explicit verification for two-dimensional space and a dimension-independent proof using Laplace expansion combined with Newton-Girard identities. This framework clarifies why the theorem's structure depends on ambient dimension and suggests extensions to higher-order tensors where classical characteristic polynomial methods fail.
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"abstract": "We demonstrate that the Cayley-Hamilton theorem is a derived consequence of a more fundamental dimensional constraint: the syzygy formed by the tensor product of two Levi-Civita symbols, which vanishes identically in m-dimensional space. By shifting perspective from the tensor A to the isotropic operators that induce A\u0027s invariants through contraction, we reveal that the Cayley-Hamilton identity emerges when this vanishing operator acts on the m-fold tensor product of A. The intrinsic tensorial form of the theorem--invariant coefficients multiplying tensor powers--is inherited from the contraction structure rather than imposed ad hoc. We provide explicit verification for two-dimensional space and a dimension-independent proof using Laplace expansion combined with Newton-Girard identities. This framework clarifies why the theorem\u0027s structure depends on ambient dimension and suggests extensions to higher-order tensors where classical characteristic polynomial methods fail.",
"arxiv_id": "2601.06136",
"authors": [
"Xiao Wang"
],
"categories": [
"math.RA",
"math.AG"
],
"license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
"title": "The Geometric Origin of the Cayley-Hamilton Theorem: A Constructive Proof via Dimensional Syzygy",
"url": "https://arxiv.org/abs/2601.06136",
"version": "v1"
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