Hille-Wintner Type Comparison Theorem for Selfadjoint Fourth Order Linear Differential Equations

L. Erbe
1980 Proceedings of the American Mathematical Society  
The well-known Hille-Wintner Theorem for second order linear differential equations is extended to fourth order selfadjoint equations.
doi:10.2307/2043731 fatcat:oagsitdtkjd5dhr6zsqi2laklm