multivalued differential equations
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2003 ◽  
Vol 2003 (25) ◽  
pp. 1615-1622 ◽  
Author(s):  
G. Grammel

Nonlinear multivalued differential equations with slow and fast subsystems are considered. Under transitivity conditions on the fast subsystem, the slow subsystem can be approximated by an averaged multivalued differential equation. The approximation in the Hausdorff sense is of orderO(ϵ1/3)asϵ→0.


1999 ◽  
Vol 12 (2) ◽  
pp. 169-178 ◽  
Author(s):  
Donal O'Regan

This paper discusses viable solutions for differential inclusions in Banach spaces. Existence will be established in two steps. In step 1, a nonlinear alternative of Leray-Schauder type [8] for maps with closed graphs will be used to establish a variety of existence principles for the Cauchy differential inclusion. Step 2 involves using the results in step 1 together with some tricks involving the Bouligand cone (and sometimes the Urysohn function) so that new existence criteria can be established for multivalued differential equations on proximate retracts.


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