枯萎将要 发表于 2025-3-26 23:36:45

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Cuisine 发表于 2025-3-27 02:33:57

Semigroup Theory and Operator Trigonometry,erator semigroup theory over 30 years ago, will be traced. This operator trigonometry, largely a creation of this author, features a notion of antieigen-value which corresponds to the largest turning angle of an operator. As such, it constitutes an extension of the Rayleigh-Ritz theory, to now inclu

Demonstrate 发表于 2025-3-27 08:50:27

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fastness 发表于 2025-3-27 11:55:50

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收养 发表于 2025-3-27 14:09:25

Invariant Subspaces and Quasiaffine Transforms of Unitary Operators,t subspace”. This turns out to be equivalent to a second conjecture, namely, “if a contraction is a quasiaffine transform of a unitary operator, then it has a nontrivial invariant subspace”. Although these are still unsolved problems, it can be proved that ... -.. This paper presents a brief review,

不妥协 发表于 2025-3-27 18:58:17

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Nausea 发表于 2025-3-27 23:57:04

On ,,-Theory of ,,-Semigroups Generated by Elliptic Second Order Differential Expressions,nstructing corresponding . .-semigroups. Lower order terms are considered as form-bounded perturbations of the generator of the symmetric Markov semi-group associated with the Dirichlet form. It is shown that the . .-semigroup corresponding to the Cauchy problem exists in a certain interval in the s

温顺 发表于 2025-3-28 03:22:32

On Dirac Observables,ind an observable A. ∈ . “close” to A, perhaps only for a given physical state .. Energy . belongs to ., but location (angular) momentum, spin,…, do not. This seems to explain at a glance the triumphs and difficulties Dirac’s theory encountered.

PATRI 发表于 2025-3-28 07:04:01

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clarify 发表于 2025-3-28 11:20:38

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查看完整版本: Titlebook: Semigroups of Operators: Theory and Applications; International Confer A. V. Balakrishnan Conference proceedings 2000 Birkhäuser Verlag Bas