Results 21 to 30 of about 251,836 (304)

On two resolvent matrices of the truncated Hausdorff matrix moment problem

Visnik Harkivsʹkogo Nacionalʹnogo Universitetu im. V.N. Karazina. Cepiâ Matematika, Prikladna Matematika i Mehanika, 2022
We consider the truncated Hausdorff matrix moment problem (THMM) in case of a finite number of even moments to be called non degenerate if two block Hankel matrices constructed via the moments are both positive definite matrices.
A. E. Choque-Rivero, B. E. Medina-Hernandez   +1 more
doaj   +1 more source

THE QUARTIC MOMENT PROBLEM

Journal of the Korean Mathematical Society, 2005
The authors consider the quartic moment problem suggested by \textit{R. E. Curto} and \textit{L. A. Fialkow} in [Mem. Am. Math. Soc. 568, 52 p. (1996; Zbl 0876.30033)]. Given complex numbers \(\gamma\equiv\gamma^{(4)}:\gamma_{00}, \gamma_{01}, \gamma_{10}, \gamma_{02}, \gamma_{11}, \gamma_{20}, \gamma_{03}, \gamma_{12}, \gamma_{21}, \gamma_{30 ...
Li, Chunji, Lee, Sang Hoon
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On the completely indeterminate case for block Jacobi matrices

Concrete Operators, 2017
We consider the infinite Jacobi block matrices in the completely indeterminate case, i. e. such that the deficiency indices of the corresponding Jacobi operators are maximal.
Osipov Andrey
doaj   +1 more source

Exact Controllability of the Heat Equation with Boundary Control and Boundary Noise

Mathematics
We study an exact controllability problem for a system governed by the heat equation with Neumann boundary control and boundary noise. We reduce the control problem to a moment problem for which we establish sufficient conditions for its resolution.
Noudjoud Hamdi, Salah-Eddine Rebiai
doaj   +1 more source

Jan Stochel, a stellar mathematician [PDF]

Opuscula Mathematica
The occasion for this survey article was the 70th birthday of Jan Stochel, professor at Jagiellonian University, former head of the Chair of Functional Analysis and a prominent member of the Kraków school of operator theory.
Sameer Chavan, Raúl Curto, Zenon Jan Jabłoński, Il Bong Jung, Mihai Putinar   +4 more
doaj   +1 more source

Embry truncated complex moment problem

, 2003
Let T be a cyclic subnormal operator on a Hilbert space H with cyclic vector x0 and let γij:=(T*iTjx0,x0), for any i,j∈N∪{0}. The Bram–Halmos’ characterization for subnormality of T involved a moment matrix M(n).
Li, Chunji, Jung, Il Bong, Ko, Eungil, Park, Sang Soo   +3 more
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Darboux transformation of symmetric Jacobi matrices and Toda lattices

Frontiers in Applied Mathematics and Statistics
Let J be a symmetric Jacobi matrix associated with some Toda lattice. We find conditions for Jacobi matrix J to admit factorization J = LU (or J = 𝔘𝔏) with L (or 𝔏) and U (or 𝔘) being lower and upper triangular two-diagonal matrices, respectively.
Ivan Kovalyov, Oleksandra Levina
doaj   +1 more source

A Comparative Study of B-, Γ- and Log-Normal Distributions in a Three-Moment Parameterization for Drop Sedimentation

Atmosphere, 2014
This paper examines different distribution functions used in a three-moment parameterization scheme with regard to their influence on the implementation and the results of the parameterization scheme.
Corinna Ziemer, Ulrike Wacker
doaj   +1 more source

On the Problem of Modified Moments [PDF]

Proceedings of the American Mathematical Society, 1984
The problem of modified moments is studied. Let ( P n ( x ) ) n ∞ = 0 \left (
openaire   +1 more source

Local moment problem

, 2014
The work is devoted to the local moment problem, which consists in finding of non-decreasing functions on the real axis having given first 2n+1; n = 0,1,2,...; power moments on the whole axis and also 2m+1 first power moments on a certain finite axis ...
Tkachenko Gorski, Igor Mijail, Adamyan, Vadym   +1 more
core   +1 more source