Degeneration of the solutions of certain well-posed systems of partial differential equations depending on a small parameter

Theory of Ordinary Differential Equations

1956 • 6,499 citations

Theory of ordinary differential equations

1956 • 5,705 citations

Partial Differential Equations

1982 • 1,798 citations

Partial differential equations

1977 • 176 citations

THE SOLUTION OF SOME PERTURBATION PROBLEMS FOR MATRICES AND SELFADJOINT OR NON-SELFADJOINT DIFFERENTIAL EQUATIONS I

1960 • 159 citations

The First Boundary Value Problem for εΔu + A(x, y)u x + B(x, y)u y + C(x, y)u = D(x, y) for Small ε

1950 • 98 citations

The mixed problem for hyperbolic equations with a small parameter

1960 • 12 citations

The parabolic equations as a limiting case of hyperbolic and elliptic equations

1963 • 10 citations

On a singular perturbation problem concerning hyperbolic equations

1964 • 9 citations