scholarly journals Measures of weak noncompactness in Banach spaces

2009 ◽  
Vol 156 (7) ◽  
pp. 1412-1421 ◽  
Author(s):  
C. Angosto ◽  
B. Cascales
Filomat ◽  
2018 ◽  
Vol 32 (3) ◽  
pp. 1117-1125 ◽  
Author(s):  
Hamza Rebai ◽  
Djamila Seba

This paper deals with nonlinear fractional differential equation with fractional separated boundary conditions. We investigate the existence of weak solutions in Banach spaces. To obtain such result we apply an appropriate fixed point theorem and the technique of measures of weak noncompactness. An example illustrating the theory is given.


2020 ◽  
Vol 4 (2) ◽  
pp. 104-115
Author(s):  
Khalil Ezzinbi ◽  

This work concerns the study of the controllability for some impulsive partial functional integrodifferential equation with infinite delay in Banach spaces. We give sufficient conditions that ensure the controllability of the system by supposing that its undelayed part admits a resolvent operator in the sense of Grimmer, and by making use of the measure of noncompactness and the Mönch fixed-point Theorem. As a result, we obtain a generalization of the work of K. Balachandran and R. Sakthivel (Journal of Mathematical Analysis and Applications, 255, 447-457, (2001)) and a host of important results in the literature, without assuming the compactness of the resolvent operator. An example is given for illustration.


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