zbMATH — the first resource for mathematics

Examples
Geometry Search for the term Geometry in any field. Queries are case-independent.
Funct* Wildcard queries are specified by * (e.g. functions, functorial, etc.). Otherwise the search is exact.
"Topological group" Phrases (multi-words) should be set in "straight quotation marks".
au: Bourbaki & ti: Algebra Search for author and title. The and-operator & is default and can be omitted.
Chebyshev | Tschebyscheff The or-operator | allows to search for Chebyshev or Tschebyscheff.
"Quasi* map*" py: 1989 The resulting documents have publication year 1989.
so: Eur* J* Mat* Soc* cc: 14 Search for publications in a particular source with a Mathematics Subject Classification code (cc) in 14.
"Partial diff* eq*" ! elliptic The not-operator ! eliminates all results containing the word elliptic.
dt: b & au: Hilbert The document type is set to books; alternatively: j for journal articles, a for book articles.
py: 2000-2015 cc: (94A | 11T) Number ranges are accepted. Terms can be grouped within (parentheses).
la: chinese Find documents in a given language. ISO 639-1 language codes can also be used.

Operators
a & b logic and
a | b logic or
!ab logic not
abc* right wildcard
"ab c" phrase
(ab c) parentheses
Fields
any anywhere an internal document identifier
au author, editor ai internal author identifier
ti title la language
so source ab review, abstract
py publication year rv reviewer
cc MSC code ut uncontrolled term
dt document type (j: journal article; b: book; a: book article)
A new theorem on exponential stability of periodic evolution families on Banach spaces. (English) Zbl 1053.47034
Authors’ abstract: We consider a mild solution v f (·,0) of a well-posed inhomogeneous Cauchy problem v ˙(t)=A(t)v(t)+f(t), v(0)=0, on a complex Banach space X, where A(·) is a 1-periodic operator-valued function. We prove that if v f (·,0) belongs to AP 0 ( + ,X), for each fAP 0 ( + ,X) then for each xX the solution of the well-posed Cauchy problem u ˙(t)=A(t)v(t), u(0)=x, is uniformly exponentially stable. The converse statement is also true. [AP 0 ( + ,X) denotes the smallest closed subspace (of the Banach space of X-valued, bounded and uniformly continuous functions on + ) which contains the almost periodic functions as well as those functins which are zero on some interval [0,t] and identical with an almost periodic function on [t,)]. Our approach is based on the spectral theory of evolution semigroups.
MSC:
47D06One-parameter semigroups and linear evolution equations
26D10Inequalities involving derivatives, differential and integral operators
34A35ODE of infinite order
34D05Asymptotic stability of ODE
34B15Nonlinear boundary value problems for ODE
45M10Stability theory of integral equations
47A06Linear relations (multivalued linear operators)