悄悄移动
发表于 2025-3-23 11:39:53
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aggressor
发表于 2025-3-23 16:49:27
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多产子
发表于 2025-3-23 21:54:14
Vascular Growth Factors and AngiogenesisLet . be an operator on a separable Hubert space. We show that if . is a compact operator and satisfies ∣T.∣ = ∣.∣. for some n, then . is normal, and that if . is a bounded operator and satisfies ∣T.∣ = ∣.∣. for . =.,. + 1, .,. + 1 (1 ≤ . <., then the polar decomposition of . is commutative. For a closed operator we obtain the analogous results.
桶去微染
发表于 2025-3-24 00:59:54
On Certain (Nearly) Convex Joint Numerical Ranges,Let . be a complex Hilbert space with scalar product denoted (··), and let .(.) denote the algebra of bounded linear operators on .. For a family r = {..: . ∈ .} ⊂ .(.) one defines the joint numerical range .(τ) by
hegemony
发表于 2025-3-24 06:16:36
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进步
发表于 2025-3-24 07:31:08
State Space Formulas for Coprime Factorizations,In this paper we will give a uniform approach to the derivation of state space formulas of coprime factorizations, of different types, for rational matrix functions.
employor
发表于 2025-3-24 11:52:19
Generalization of Heinz-Kato Theorem Via Furuta Inequality,A capital letter means a bounded linear operator on a complex Hilbert space .. An operator . is said to be positive if (., .) ≥ 0 for all . ∈..
不可磨灭
发表于 2025-3-24 17:11:56
The Band Method for Bordered Algebras,The band method for positive definite extension problems of non-band type is specified for the bordered case. A fractional type description of all positive extensions is new. We illustrate the result for Fredholm integral operators. The notion of Schur complement plays a crucial role.
会议
发表于 2025-3-24 20:47:31
,,-Distance between Unitary Orbits in Type III, Factors,Let . bea factor of type III.*, 0 < λ < 1, and , 1 ≤ . ≤ ∞, the discrete Haagerup ..spaces. We obtain the ..-distance formula between the unitary orbits of selfadjoint elements in in terms of their generalized .-numbers, and determine the diameter of the quotient space (or the closed unitary orbit space) of the positive unit sphere of ..(.).
Stricture
发表于 2025-3-25 02:08:10
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