A novel procedure for constructing invariant subspaces of a set of matrices
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2021
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| _version_ | 1866913482182492160 |
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| author | Al-Dweik, Ahmad Y. Ghanam, Ryad Thompson, Gerard Azad, Hassan |
| author_facet | Al-Dweik, Ahmad Y. Ghanam, Ryad Thompson, Gerard Azad, Hassan |
| contents | A problem that is frequently encountered in a variety of mathematical contexts, is to find the common invariant subspaces of a single, or set of matrices. A new method is proposed that gives a definitive answer to this problem. The key idea consists of finding common eigenvectors for exterior powers of the matrices concerned. A convenient formulation of the Plücker relations is then used to ensure that these eigenvectors actually correspond to subspaces or provide the initial constraints for eigenvectors involving parameters. A procedure for computing the divisors of totally decomposable vector is also provided. Several examples are given for which the calculations are too tedious to do by hand and are performed by coding the conditions found into Maple. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2103_08316 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | A novel procedure for constructing invariant subspaces of a set of matrices Al-Dweik, Ahmad Y. Ghanam, Ryad Thompson, Gerard Azad, Hassan General Mathematics A problem that is frequently encountered in a variety of mathematical contexts, is to find the common invariant subspaces of a single, or set of matrices. A new method is proposed that gives a definitive answer to this problem. The key idea consists of finding common eigenvectors for exterior powers of the matrices concerned. A convenient formulation of the Plücker relations is then used to ensure that these eigenvectors actually correspond to subspaces or provide the initial constraints for eigenvectors involving parameters. A procedure for computing the divisors of totally decomposable vector is also provided. Several examples are given for which the calculations are too tedious to do by hand and are performed by coding the conditions found into Maple. |
| title | A novel procedure for constructing invariant subspaces of a set of matrices |
| topic | General Mathematics |
| url | https://arxiv.org/abs/2103.08316 |