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The Isomorphisms Between The Upper And Lower Triangular Matrix Algebras, Zahi Fawaz
The Isomorphisms Between The Upper And Lower Triangular Matrix Algebras, Zahi Fawaz
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Since matrix equations with triangular matrices are easier to solve, the triangular matrices are very important in mathematics. For instance, the LU decomposition gives an algorithm to decompose any invertible matrix A into two triangular factors: a lower triangle matrix L and an upper triangle matrix U. Moreover, the inverse of a triangular matrix is also triangular. Also the product of two lower triangular matrices produces a lower triangular matrix, the same apply for upper triangular matrices. A lot of important notions, such as the determinant, the eigenvalue problem and many others are easy to handle when we are working …