Columbia subject headings:
Asymptotic expansions.
Boundary value problems.
Eigenvalues.
Elliptic operators.
Fiberings (Mathematics)
Initial value problems.
Spectral theory (Mathematics)
Harvard subject headings:
Asymptotic expansions.
Boundary value problems.
Eigenvalues.
Elliptic operators.
Fiberings (Mathematics)
Initial value problems.
Spectral theory (Mathematics)
Princeton subject headings:
Asymptotic expansions.
Boundary value problems.
Eigenvalues.
Elliptic operators.
Fiberings (Mathematics)
Initial value problems.
Spectral theory (Mathematics)