A criterion of contractivity for four by four upper-triangular matrices
Fuente:
arXiv
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| _version_ | 1866915345789353984 |
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| author | Renard, Axel |
| author_facet | Renard, Axel |
| contents | We establish an explicit criterion for determining whether a $4 \times 4$ upper-triangular matrix is a contraction with respect to the Euclidean operator norm. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_10485 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A criterion of contractivity for four by four upper-triangular matrices Renard, Axel Functional Analysis We establish an explicit criterion for determining whether a $4 \times 4$ upper-triangular matrix is a contraction with respect to the Euclidean operator norm. |
| title | A criterion of contractivity for four by four upper-triangular matrices |
| topic | Functional Analysis |
| url | https://arxiv.org/abs/2506.10485 |