Geodesic
Minimal and maximal solutions of fourth order iterated differential equations with singular nonlinearity
Archivum mathematicum, Tome 47 (2011) no. 1, pp. 23-33 Cet article a éte moissonné depuis la source Czech Digital Mathematics Library

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In this paper we are concerned with sufficient conditions for the existence of minimal and maximal solutions of differential equations of the form \[ L_{4}y+f(t,y)=0\,, \] where $L_{4}y$ is the iterated linear differential operator of order $4$ and $f\colon [a,\infty )\times (0,\infty )\rightarrow (0,\infty )$ is a continuous function.
In this paper we are concerned with sufficient conditions for the existence of minimal and maximal solutions of differential equations of the form \[ L_{4}y+f(t,y)=0\,, \] where $L_{4}y$ is the iterated linear differential operator of order $4$ and $f\colon [a,\infty )\times (0,\infty )\rightarrow (0,\infty )$ is a continuous function.
Classification : 34C10
Keywords: iterated differential equations; maximal and minimal solutions 
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Rostás, Kristína. Minimal and maximal solutions of fourth order iterated differential equations  with singular nonlinearity. Archivum mathematicum, Tome 47 (2011) no. 1, pp. 23-33. http://geodesic.mathdoc.fr/item/ARM_2011_47_1_a2/

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