On commuting matrix differential operators.
Weikard, Rudi (2002)
The New York Journal of Mathematics [electronic only]
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Weikard, Rudi (2002)
The New York Journal of Mathematics [electronic only]
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We consider linear difference equations whose coefficients are meromorphic at . We characterize the meromorphic equivalence classes of such equations by means of a system of meromorphic invariants. Using an approach inspired by the work of G. D. Birkhoff we show that this system is free.
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