Symmetric subrank and its border analogue
Fuente:
arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866908963204759552 |
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| author | Biaggi, Benjamin Draisma, Jan de Nooij, Koen van Santen, Immanuel |
| author_facet | Biaggi, Benjamin Draisma, Jan de Nooij, Koen van Santen, Immanuel |
| contents | The symmetric subrank of homogeneous polynomial is the largest number of terms in a diagonal form to which it can be specialized by a (typically non-invertible) linear variable substitution. Building on earlier work by Derksen-Makam-Zuiddam and Biaggi-Chang-Draisma-Rupniewski for ordinary tensors, we determine the asymptotic behavior of symmetric subrank and symmetric border subrank of degree-d forms as the number of variables tends to infinity. Furthermore, by using results from geometric invariant theory we show that for cubic (resp. quartic) forms the symmetric subrank and symmetric border subrank coincide if the latter is at most three (resp. two). |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_12801 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Symmetric subrank and its border analogue Biaggi, Benjamin Draisma, Jan de Nooij, Koen van Santen, Immanuel Algebraic Geometry Computational Complexity Commutative Algebra 15A69, 14L24, 68Q17, 14N25 The symmetric subrank of homogeneous polynomial is the largest number of terms in a diagonal form to which it can be specialized by a (typically non-invertible) linear variable substitution. Building on earlier work by Derksen-Makam-Zuiddam and Biaggi-Chang-Draisma-Rupniewski for ordinary tensors, we determine the asymptotic behavior of symmetric subrank and symmetric border subrank of degree-d forms as the number of variables tends to infinity. Furthermore, by using results from geometric invariant theory we show that for cubic (resp. quartic) forms the symmetric subrank and symmetric border subrank coincide if the latter is at most three (resp. two). |
| title | Symmetric subrank and its border analogue |
| topic | Algebraic Geometry Computational Complexity Commutative Algebra 15A69, 14L24, 68Q17, 14N25 |
| url | https://arxiv.org/abs/2604.12801 |