Introduzione
Abstract
En
We give a method to establish when the solution of the semi-linear initial-value problem:
 of the semi-linear initial-value problem:  
 ![t \in [0,T]](http://siba-ese.unile.it/plugins/generic/latexRender/cache/32bbd4a286ac4d26a80c9c10182eead0.png) ;
;  belongs to a closed cone Q of a Banach space X.
 belongs to a closed cone Q of a Banach space X.
		We give a method to establish when the solution
 of the semi-linear initial-value problem:
 of the semi-linear initial-value problem:  
 ![t \in [0,T]](http://siba-ese.unile.it/plugins/generic/latexRender/cache/32bbd4a286ac4d26a80c9c10182eead0.png) ;
;  belongs to a closed cone Q of a Banach space X.
 belongs to a closed cone Q of a Banach space X.DOI Code:
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