@article{Guo2023, 
author = {Limin Guo and Jiafa Xu and Donal O'Regan},
title = {Positive radial solutions for a boundary value problem associated to a system of elliptic equations with semipositone nonlinearities},
year = {2023},
journal = {AIMS Mathematics},
volume = {8},
number = {1},
pages = {1072-1089},
keywords = {system of elliptic equations, boundary value problem, positive radial solution, fixed point index},
url = {https://www.sciopen.com/article/10.3934/math.2023053},
doi = {10.3934/math.2023053},
abstract = {In this paper we use the fixed point index theory to study the existence of positive radial solutions for a system of boundary value problems with semipositone second order elliptic equations. Some appropriate concave and convex functions are utilized to characterize coupling behaviors of our nonlinearities.}
}