Elliptic partial differential equation - Wikipedia
https://en.wikipedia.org/wiki/Elliptic_partial_differential_equationElliptic equations have no real characteristic curves, curves along which it is not possible to eliminate at least one second derivative of from the conditions of the Cauchy problem. Since characteristic curves are the only curves along which solutions to partial differential equations with smooth parameters can have discontinuous derivatives, solutions to elliptic equations cannot have discontinuous derivatives anywhere. This means elliptic equations are well suited t…
Elliptic Differential Operators and Spectral Analysis ...
Elliptic Differential Operators and Spectral Analysis. Authors. (view affiliations) D. E. Edmunds. W.D. Evans. Presents core material on elliptic operators as well as advanced topics. Provides detailed information about the function spaces …
Elliptic operator - Wikipedia
https://en.wikipedia.org/wiki/Elliptic_operatorIn the theory of partial differential equations, elliptic operators are differential operators that generalize the Laplace operator. They are defined by the condition that the coefficients of the highest-order derivatives be positive, which implies the key property that the principal symbol is invertible, or
Elliptic operator - HandWiki
handwiki.org › wiki › Elliptic_operatorSep 27, 2021 · In the theory of partial differential equations, elliptic operators are differential operators that generalize the Laplace operator.They are defined by the condition that the coefficients of the highest-order derivatives be positive, which implies the key property that the principal symbol is invertible, or equivalently that there are no real characteristic directions.