Real and finite field versions of Chebotarev's theorem
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866914065952014336 |
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| author | Emmrich, Tarek Kunis, Stefan |
| author_facet | Emmrich, Tarek Kunis, Stefan |
| contents | Chebotarev's theorem on roots of unity states that all minors of the Fourier matrix of prime size are non-vanishing. This result has been rediscovered several times and proved via different techniques. We follow the proof of Evans and Isaacs and generalize the original result to a real version and a version over finite fields. For the latter, we are able to remove an order condition between the characteristic of the field and the size of the matrix as well as decrease a sufficient lower bound on the characteristic by Zhang considerably. Direct applications include a specific real phase retrieval problem as well as a recent result for Riesz bases of exponentials. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2506_02947 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Real and finite field versions of Chebotarev's theorem Emmrich, Tarek Kunis, Stefan Numerical Analysis 1T06, 15B33, 15B99, 43A25, 65T50 Chebotarev's theorem on roots of unity states that all minors of the Fourier matrix of prime size are non-vanishing. This result has been rediscovered several times and proved via different techniques. We follow the proof of Evans and Isaacs and generalize the original result to a real version and a version over finite fields. For the latter, we are able to remove an order condition between the characteristic of the field and the size of the matrix as well as decrease a sufficient lower bound on the characteristic by Zhang considerably. Direct applications include a specific real phase retrieval problem as well as a recent result for Riesz bases of exponentials. |
| title | Real and finite field versions of Chebotarev's theorem |
| topic | Numerical Analysis 1T06, 15B33, 15B99, 43A25, 65T50 |
| url | https://arxiv.org/abs/2506.02947 |