Extremal property of the equation $y''=-k^2y$
Neuman, František
Archivum Mathematicum, Tome 003 (1967), p. 161-164 / Harvested from Czech Digital Mathematics Library
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Publié le : 1967-01-01
Classification:  34A34,  34H05 
@article{104641,
     author = {Franti\v sek Neuman},
     title = {Extremal property of the equation $y''=-k^2y$},
     journal = {Archivum Mathematicum},
     volume = {003},
     year = {1967},
     pages = {161-164},
     zbl = {0217.40202},
     mrnumber = {0236465},
     language = {en},
     url = {http://dml.mathdoc.fr/item/104641}
}

Neuman, František. Extremal property of the equation $y''=-k^2y$. Archivum Mathematicum, Tome 003 (1967) pp. 161-164. http://gdmltest.u-ga.fr/item/104641/

Neuman F. Sur les équations différentielles linéaires oscillatoires du deuxième ordre avec la dispersion fondamentale $\varphi (t) = t+\pi$, Bull. Inst. Polyt. (Iaşi), T. X (XIV), 1964, 37-42. (1964) | MR 0197825 | Zbl 0151.12202

Neuman F. Criterion of periodicity of solutions of a certain differential equation with a periodic coefficient, Annali di Mat. p. ed. appl., S. IV. N., T. LXXV, (1967), 385-396. (1967) | MR 0213652 | Zbl 0148.07104