年迈
发表于 2025-3-21 18:08:51
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outrage
发表于 2025-3-21 21:04:14
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混合
发表于 2025-3-22 04:20:00
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疏远天际
发表于 2025-3-22 08:28:16
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Blemish
发表于 2025-3-22 09:37:10
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Delirium
发表于 2025-3-22 13:04:37
0255-0156 onference program, the list of participants and an updated l.A colloquium on operator theory was held in Vienna, Austria, in March 2004, on the occasion of the retirement of Heinz Langer, a leading expert in operator theory and indefinite inner product spaces. The book contains fifteen refereed arti
颂扬本人
发表于 2025-3-22 18:38:27
Book 2006as of operator theory, all of them related with the work of Heinz Langer. The topics range from abstract spectral theory in Krein spaces to more concrete applications, such as boundary value problems, the study of orthogonal functions, or moment problems. The book closes with a historical survey paper. .
艰苦地移动
发表于 2025-3-22 22:55:29
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–FER
发表于 2025-3-23 03:13:35
-functions of Quasi-selfadjoint Contractionssed linear subspace . of ℌ containing ran (.*) the operator-valued function . (.)=. (.).↾., |.|>1, where . is the orthogonal projector from ℌ onto ., is said to be a . of . acting on the subspace .. The main properties of such .-functions are studied, in particular the underlying operator-theoretica
rods366
发表于 2025-3-23 06:46:59
Riesz Bases of Root Vectors of Indefinite Sturm-Liouville Problems with Eigenparameter Dependent Bou. We give sufficient conditions under which a basis of each root subspace for this Sturm-Liouville problem can be selected so that the union of all these bases constitutes a Riesz basis of a corresponding weighted Hilbert space.