Bounds for zeros of a polynomial using numerical radius of Hilbertian space operators
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2019
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| _version_ | 1866914919477149696 |
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| author | Bhunia, Pintu Bag, Santanu Paul, Kallol |
| author_facet | Bhunia, Pintu Bag, Santanu Paul, Kallol |
| contents | We obtain bounds for the numerical radius of $2 \times 2$ operator matrices which improve on the existing bounds. We also show that the inequalities obtained here generalize the existing ones. As an application of the results obtained here we estimate the bounds for the zeros of a monic polynomial and illustrate with numerical examples that the bounds are better than the existing ones. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_1906_07363 |
| institution | arXiv |
| publishDate | 2019 |
| record_format | arxiv |
| spellingShingle | Bounds for zeros of a polynomial using numerical radius of Hilbertian space operators Bhunia, Pintu Bag, Santanu Paul, Kallol Functional Analysis 47A12, 15A60, 26C10 We obtain bounds for the numerical radius of $2 \times 2$ operator matrices which improve on the existing bounds. We also show that the inequalities obtained here generalize the existing ones. As an application of the results obtained here we estimate the bounds for the zeros of a monic polynomial and illustrate with numerical examples that the bounds are better than the existing ones. |
| title | Bounds for zeros of a polynomial using numerical radius of Hilbertian space operators |
| topic | Functional Analysis 47A12, 15A60, 26C10 |
| url | https://arxiv.org/abs/1906.07363 |