@article{BUMI_1964_3_19_3_306_0, author = {Richard Bellman}, title = {Oscillatroy and unimodal properties of solutions of second order linear differential equations.}, journal = {Bollettino dell'Unione Matematica Italiana}, volume = {19}, year = {1964}, pages = {306-310}, zbl = {0136.07604}, mrnumber = {168837}, language = {en}, url = {http://dml.mathdoc.fr/item/BUMI_1964_3_19_3_306_0} }
Bellman, Richard. Oscillatroy and unimodal properties of solutions of second order linear differential equations.. Bollettino dell'Unione Matematica Italiana, Tome 19 (1964) pp. 306-310. http://gdmltest.u-ga.fr/item/BUMI_1964_3_19_3_306_0/
[1] On the Nonnegativity of Solutions of the Heat equation, «Boll. d. Unione Matematica Italiana», Vol. 12, 1957, pp. 520-523. | MR 90880 | Zbl 0079.31401
,[2] On Variation-diminishing Properties of Green's Functions, «Boll. d Unione Matematica Italiana», Vol. 16, 1961, pp., 154-166. | MR 130429 | Zbl 0099.06805
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