## On a distribution of zeros of solutions of a fourth-order iterated linear differential equation.(English)Zbl 0422.34037

### MSC:

 34C10 Oscillation theory, zeros, disconjugacy and comparison theory for ordinary differential equations 34C20 Transformation and reduction of ordinary differential equations and systems, normal forms 34A30 Linear ordinary differential equations and systems

Zbl 0153.112
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### References:

 [1] Sherman T. L.: Properties of solutions of $$N^{\text th}$$ order linear differential equations. Pacific J. Math., Vol. 15, No. 3, 1965. [2] Borůvka O.: Lineare Differentialtransformationen 2. Ordnung. VEB Deutscher Verlag der Wissenschaften, Berlin, 1967. · Zbl 0153.11201
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