scholarly journals Necessary conditions for the existence of positive solutions of second-order linear difference equations and sufficient conditions for the oscillation of solutions

2009 ◽  
Vol 12 (2) ◽  
pp. 184-198 ◽  
Author(s):  
R. Koplatadze ◽  
G. Kvinikadze
2017 ◽  
Vol 24 (3) ◽  
pp. 305-343 ◽  
Author(s):  
A. M. Encinas ◽  
M. J. Jiménez

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