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Burchnall-Chaundy Theory

Research paper by Sebastian Klein, Eva Lübcke, Martin Ulrich Schmidt, Tobias Simon

Indexed on: 14 Jan '20Published on: 13 Jan '20Published in: arXiv - Mathematics - Spectral Theory



Abstract

The Burchnall-Chaundy theory concerns the classification of all pairs of commuting ordinary differential operators. We phrase this theory in the language of spectral data for integrable systems. In particular, we define spectral data for rank 1 commutative algebras $A$ of ordinary differential operators. We solve the inverse problem for such data, i.e. we prove that the algebra $A$ is (essentially) uniquely determined by its spectral data. The isomorphy type of $A$ is uniquely determined by the underlying spectral curve.