Abstract
We discuss a concavity like property for functions u satisfying D?0+u ? C[0,
b] with u(0) = 0 and -D?0+u(t) ? 0 for all t ? [0,b]. We develop the
property for ? ? (1,2], where D?0+ is the standard Riemann-Liouville
fractional derivative. We observe the property is also valid in the case ? =
1. Finally, we show that under certain conditions, -D?0+u(t) ? 0 implies u
is concave in the classical sense.
Publisher
National Library of Serbia
Cited by
2 articles.
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