## A note on the definiteness of the differential equations $$y'' = q(t)y$$.(English)Zbl 0412.34019

### MSC:

 34C10 Oscillation theory, zeros, disconjugacy and comparison theory for ordinary differential equations

Zbl 0222.34002
Full Text:

### References:

 [1] Borůvka O.: Lineare Differentialtransformationen 2. Ordnung. VEB Deutscher Verlag der Wissenschaften Berlin 1967. · Zbl 0153.11201 [2] J. Krbila: Rýdzo diskonjugované homogénne lineárne diferenciálne rovnice druhého rádu. Časopis pro pěstování matematiky
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