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inverse matrix (Rev #9, changes) in nLab

nLab inverse matrix (Rev #9, changes)

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Contents

Properties

Proposition

(fundamental theorem of invertible matrices)

For nn \in \mathbb{N} and AMat n×n(k)A \in Mat_{n \times n}(k) a square matrix, the following are equivalent:

  1. AA is an invertible matrix;

  2. AA is the matrix product of elementary matrices.

References

Formulas for inverses of block matrices:

  • Tzon-Tzer (Sec. Lu, 2 Sheng-Hua in) Shiou, D. Krob, B. Leclerc, Inverses Minor of identities for quasi-determinants and quantum determinants2×22 \times 2 block matrices , Computers Comm. & Math. Mathematics Phys. with 169 Applications (1995) 1–2343doi 1–2 arXiv: (2002) 119-129 []hep-th/9411194

  • Müge Tzon-Tzer Saadetoğlu, Lu, Şakir Sheng-Hua Mehmet Shiou, Dinsev, Inverses and Determinants ofn2×n2 n 2 \times n 2 Block block Matrices matrices , Computers & Mathematics with Applications 11 43 17 1–2 (2023) (2002) 3784 119-129 [[doi:10.3390/math11173784](https://doi.org/10.3390/math11173784)] []

  • Müge Saadetoğlu, Şakir Mehmet Dinsev, Inverses and Determinants of n×nn \times n Block Matrices, Mathematics 11 17 (2023) 3784 [[doi:10.3390/math11173784](https://doi.org/10.3390/math11173784)]

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