An existence criterion of positive solutions of -type retarded functional differential equations
Diblík, Josef, Svoboda, Zdeněk
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Diblík, Josef, Svoboda, Zdeněk
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Toshiaki Kusahara, Hiroyuki Usami (2000)
Czechoslovak Mathematical Journal
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Zbyněk Kubáček (1999)
Archivum Mathematicum
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It is proved that under some conditions the set of all solutions of an initial value problem for -th order functional differential system on an unbounded interval is a compact .