Results 81 to 90 of about 103,519 (218)
Cumhuriyet Science Journal, 2019 It is purpose of this paper to investigateSturm-Liouville equation on many-interval with the eigenvalue parameter appearing linearly in theboundary conditions and with two supplementary transmission conditions.
Hayati Olğar
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Kneser-Hecke-operators in coding theory
, 2006 The Kneser-Hecke-operator is a linear operator defined on the complex vector space spanned by the equivalence classes of a family of self-dual codes of fixed length.
Nebe, Gabriele
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Effect of Field Line Torsion on the Polarization of ULF Waves
Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.Abstract In this paper we suggest a simple modification of the dipole magnetic field which introduces field‐aligned currents and torsion to the field lines. The resulting field lines are not contained in the meridional planes and have resemblance to the geomagnetic field lines in the dawn and dusk flanks of the magnetosphere. We analyze polarization of
K. Kabin, A. W. Degeling, R. Rankin
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Two-interval even order differential operators in direct sum spaces with inner product multiples
上海师范大学学报. 自然科学版, 2017 We study two-interval singular differential equations and show that their self-adjoint operator realizations in direct sum Hilbert spaces can be enlarged by using inner product multiples.
Suo Jianqing, Wang Wanyi
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Journal of Function Spaces, 2020 This paper deals with a singular (Weyl’s limit circle case) non-self-adjoint (dissipative) Dirac operator with eigenparameter dependent boundary condition and finite general transfer conditions.
Kun Li +3 more
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Maximally dissipative and self‐adjoint extensions of K$K$‐invariant operators
Bulletin of the London Mathematical Society, Volume 58, Issue 5, May 2026.Abstract We introduce the notion of K$K$‐invariant operators, S$S$, in a Hilbert space, with respect to a bounded and boundedly invertible operator K$K$ defined via K∗SK=S$K^*SK=S$. Conditions such that self‐adjoint and maximally dissipative extensions of K$K$‐invariant symmetric operators are also K$K$‐invariant are investigated.
Christoph Fischbacher +2 more
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Characterizations of Ordered Self-adjoint Operator Spaces
, 2016 In this paper, we generalize the work of Werner and others to develop two abstract characterizations for self-adjoint operator spaces. The corresponding abstract objects can be represented as self-adjoint subspaces of $B(H)$ in such a way that both a ...
Russell, Travis
core
Self-adjointness of deformed unbounded operators [PDF]
Journal of Mathematical Physics, 2015 We consider deformations of unbounded operators by using the novel construction tool of warped convolutions. By using the Kato-Rellich theorem, we show that unbounded self-adjoint deformed operators are self-adjoint if they satisfy a certain condition.
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Global weak solutions for the compressible Poisson–Nernst–Planck–Navier–Stokes system
Journal of the London Mathematical Society, Volume 113, Issue 5, May 2026.Abstract We consider the compressible Poisson–Nernst–Planck–Navier–Stokes (PNPNS) system of equations, governing the transport of charged particles under the influence of the self‐consistent electrostatic potential, in a three‐dimensional bounded domain.
Daniel Marroquin, Dehua Wang
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Functions of Several Self-Adjoint Operators [PDF]
Proceedings of the American Mathematical Society, 1968 Hermann Weyl, in [6], defined a functional calculus to deal with the unbounded selfadjoint operators of differentiation and multiplication by a position coordinate. In this paper we examine this calculus in the case of bounded operators.' We let x be a vector (xi, * , x ,) in Rn, dx=dxi ... dXn, (X, x)=XIxI+ * +Xnxn.
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