Tridiagonalization of systems of coupled linear differential equations with variable coefficients by a Lanczos-like method
نویسندگان
چکیده
We show constructively that, under certain regularity assumptions, any system of coupled linear differential equations with variable coefficients can be tridiagonalized by a time-dependent Lanczos-like method. The proof we present formally establishes the convergence so-called ?-Lanczos algorithm and yields full characterization algorithmic breakdowns. From there, solution original is available in finite treatable number scalar integral equations. This key piece evaluating elusive ordered exponential function both numerically.
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ژورنال
عنوان ژورنال: Linear Algebra and its Applications
سال: 2021
ISSN: ['1873-1856', '0024-3795']
DOI: https://doi.org/10.1016/j.laa.2021.04.011