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Evolution of positive solution curves in semipositone problems with concave nonlinearities. (English) Zbl 0985.34014

The authors examine existence, multiplicity and stability of positive solutions to a Dirichlet boundary value problem for a particular one-dimensional second-order nonlinear ordinary differential equation. They establish certain conditions on the nonlinear component of the equation, which allow for multiple positive solutions and under an appropriate assumption to establish the number of positive solutions. Examples illustrating the theory are provided.

MSC:

34B15 Nonlinear boundary value problems for ordinary differential equations
34L30 Nonlinear ordinary differential operators

References:

[1] A. Castro and S. Gadam, Uniqueness of stable and unstable positive solutions for semipositone problems, Nonlinear Anal.22, No. , 425-429.; A. Castro and S. Gadam, Uniqueness of stable and unstable positive solutions for semipositone problems, Nonlinear Anal.22, No. , 425-429. · Zbl 0804.35038
[2] A. Castro, S. Gadam, and R. Shivaji, Branches of radial solutions for semipositone problems, J. Differential Equations120, No. , 30-45.; A. Castro, S. Gadam, and R. Shivaji, Branches of radial solutions for semipositone problems, J. Differential Equations120, No. , 30-45. · Zbl 0838.34037
[3] Castro, A.; Gadam, S.; Shivaji, R., Positive solution curves of semipositone problems with concave nonlinearities, Proc. Roy. Soc. Edinburgh Sect. A, 127A, 921-934 (1997) · Zbl 0884.35040
[4] Castro, A.; Garner, J.; Shivaji, R., Existence results for classes of sublinear semipositone problems, Results. Math., 23, 214-220 (1993) · Zbl 0785.35073
[5] Castro, A.; Shivaji, R., Non-negative solutions for a class of non-positone problems, Proc. Roy. Soc. Edinburgh Sect. A, 108, 291-302 (1988) · Zbl 0659.34018
[6] Myerscough, M. R.; Gray, B. F.; Hogarth, W. L.; Norbury, J., An analysis of an ordinary differential equations model for a two species predator-prey system with harvesting and stocking, J. Math. Biol., 30, 389-411 (1992) · Zbl 0749.92022
[7] Wang, S.-H., Positive solutions for a class of nonpositone problems with concave nonlinearities, Proc. Roy. Soc. Edinburgh, 124, 507-515 (1994) · Zbl 0804.34027
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