Geodesic
Nonnegative point spectrum for differential equations with infinite delays
Portugaliae mathematica, Tome 40 (1981) no. 2, pp. 239-251.

Voir la notice de l'article provenant de la source European Digital Mathematics Library

Keywords: first order differential equation, linear retarded functional differential equation, infinite delay 
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     author = {Ferreira, Jos\'e M.},
     title = {Nonnegative point spectrum for differential equations with infinite delays},
     journal = {Portugaliae mathematica},
     pages = {239--251},
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     number = {2},
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}
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Ferreira, José M. Nonnegative point spectrum for differential equations with infinite delays. Portugaliae mathematica, Tome 40 (1981) no. 2, pp. 239-251. http://geodesic.mathdoc.fr/item/PORMA_1981__40_2_115447/