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Displaying 21 – 40 of 11160

A boundary value problem with a discontinuous coefficient and containing a spectral parameter in the boundary condition.

Darwish, A.A. (1995)

International Journal of Mathematics and Mathematical Sciences

A $C^{*}$ -algebraic Schoenberg theorem

Ola Bratteli, Palle E. T. Jorgensen, Akitaka Kishimoto, Donald W. Robinson (1984)

Annales de l'institut Fourier

Let $𝔄$ be a $C^{*}$ -algebra, $G$ a compact abelian group, $τ$ an action of $G$ by $*$ -automorphisms of $𝔄, 𝔄^{τ}$ the fixed point algebra of $τ$ and $𝔄_{F}$ the dense sub-algebra of $G$ -finite elements in $𝔄$ . Further let $H$ be a linear operator from $𝔄_{F}$ into $𝔄$ which commutes with $τ$ and vanishes on $𝔄^{τ}$ . We prove that $H$ is a complete dissipation if and only if $H$ is closable and its closure generates a $C_{0}$ -semigroup of completely positive contractions. These complete dissipations are classified in terms of certain twisted negative definite...

A canonical trace associated with certain spectral triples.

Paycha, Sylvie (2010)

SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]

A cantilever equation with nonlinear boundary conditions.

Infante, G., Pietramala, P. (2009)

Electronic Journal of Qualitative Theory of Differential Equations [electronic only]

A categorical approach to invariant means and fixed point properties.

M.W. Grossman (1972)

Semigroup forum

A cell cycle model and translation semigroups.

L. Aloui (1997)

Semigroup forum

A certain type of partial differential equations on tori

Michal Fečkan (1992)

Mathematica Bohemica

The existence of classical solutions for some partial differential equations on tori is shown.

A characterisation of dilation-analytic operators

E. Balslev, A. Grossmann, T. Paul (1986)

Annales de l'I.H.P. Physique théorique

A characterization for the spectral capacity of a finite system of operators

Ştefan Frunză (1977)

Czechoslovak Mathematical Journal

A characterization of chaotic order.

Yang, Changsen, Gao, Fugen (2006)

Journal of Inequalities and Applications [electronic only]

A characterization of chaotic order and a problem.

Fujii, Masatoshi, Jiang, Jian Fei, Kamei, Eizaburo, Tanahashi, Kotaro (1998)

Journal of Inequalities and Applications [electronic only]

A characterization of commutators with Hilbert transforms

D. Przeworska-Rolewicz (1972)

Studia Mathematica

A characterization of dichotomy in terms of boundedness of solutions for some Cauchy problems.

Zada, Akbar (2008)

Electronic Journal of Differential Equations (EJDE) [electronic only]

A characterization of evolution operators

Naoki Tanaka (2001)

Studia Mathematica

A class of evolution operators is introduced according to the device of Kato. An evolution operator introduced here provides a classical solution of the linear equation u'(t) = A(t)u(t) for t ∈ [0,T], in a general Banach space. The paper presents a necessary and sufficient condition for the existence and uniqueness of such an evolution operator.

A characterization of exponential stability for periodic evolution families in terms of lower semicontinuous functionals.

Buşe, Constantin (2003)