Abstract:In this paper we consider three concepts of uniform exponential trichotomy on the half-line in the general framework of evolution operators in Banach spaces. We obtain a systematic classification of uniform exponential trichotomy concepts and the connections between them.
“…These concepts were studied in an extensive manner from the point of view of uniform, nonuniform, exponential and polynomial behaviors ( see, for example: [1], [2], [3], [5], [8], [9], [11], [13], [15], [16], [17], [18], [19] ).…”
Abstract. The paper considers some concepts of (h, k)-dichotomy and (h, k)-trichotomy for noninvertible evolution operators in Banach spaces. A characterization of the (h, k)-trichotomy of an evolution operator in terms of (h, k)-dichotomy for two associated evolution operators is given. As applications of this result, characterizations for nonuniform exponential trichotomy and nonuniform polynomial trichotomy are obtained.
“…These concepts were studied in an extensive manner from the point of view of uniform, nonuniform, exponential and polynomial behaviors ( see, for example: [1], [2], [3], [5], [8], [9], [11], [13], [15], [16], [17], [18], [19] ).…”
Abstract. The paper considers some concepts of (h, k)-dichotomy and (h, k)-trichotomy for noninvertible evolution operators in Banach spaces. A characterization of the (h, k)-trichotomy of an evolution operator in terms of (h, k)-dichotomy for two associated evolution operators is given. As applications of this result, characterizations for nonuniform exponential trichotomy and nonuniform polynomial trichotomy are obtained.
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