NASA NTRS · 19890032457
Canonical coordinates for partial differential equations
Abstract
Necessary and sufficient conditions are found under which operators of the form Sigma (m, j=1) x (2) sub j + X sub O can be made constant coefficient. In addition, necessary and sufficient conditions are derived which classify those linear partial differential operators that can be moved to the Kolmogorov type.
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Hunt, L. R., Villarreal, Ramiro. 1988-01-01. Canonical coordinates for partial differential equations. https://ntrs.nasa.gov/citations/19890032457
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