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Oscillation theory. (English) Zbl 0258.35001
Lecture Notes in Mathematics. 324. Berlin-Heidelberg-New York: Springer-Verlag. VI, 109 p. DM 16.00; $ 6.00 (1973).

35-02 Research exposition (monographs, survey articles) pertaining to partial differential equations
35G99 General higher-order partial differential equations and systems of higher-order partial differential equations
35B05 Oscillation, zeros of solutions, mean value theorems, etc. in context of PDEs
35L15 Initial value problems for second-order hyperbolic equations
35J15 Second-order elliptic equations
35P05 General topics in linear spectral theory for PDEs
34-02 Research exposition (monographs, survey articles) pertaining to ordinary differential equations
34C10 Oscillation theory, zeros, disconjugacy and comparison theory for ordinary differential equations