NON-PARABOLIC SYSTEMS OF LINEAR DIFFERENTIAL EQUATIONS IN TWO INDEPENDENT VARIABLES
CALIFORNIA INST OF TECH PASADENA
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Aspects of general elliptic systems of linear equations are discussed, and a beginning is also attempted of the development of a general theory of systems of mixed type. The attack stems from a well-known theorem about matrices by use of which any system of first order, linear, partial differential equations in two variables can be decomposed, after linear transformations of the dependent variables and linear recombinations of the equations, into subsystems of a small number of sharply distinguished canonical types.
- Theoretical Mathematics