Linear ordinary differential equations of order n
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Construction of the Weyl algebra (noncommutative “differential polynomials of one independent variable”). Division with remainder, factorization, solutions.
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Reconstruction of differential equations from their solutions. Riemann theorem.
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Regular and Fuchsian operators. Complete local reducibility. Fuchs theorem (local regularity
local Fuchs property) and its reformulations.
Recommended reading: Section 19 from the book (printing disabled)
