1) asymptotic unitary similarity
逼近酉相似
1.
The characteristics of a linear surjective map φ on B(H) preserving asymptotic unitary similarity in both directions are studied.
研究了B(H)上双边保持逼近酉相似的线性满射φ的特征。
2) minimal asymptotic u-similarity
极小逼近酉相似
4) unitary similarity
酉相似
1.
Since unitary congruence of quaternion matrices is in connection with unitary similarity of quaternion matrices,we also discuss some properties of the unitary similarity of quaternion matrices.
由于四元数矩阵的酉相合与酉相似有着密切联系,本文还讨论了四元数矩阵的酉相似的一些性质。
5) approximately unitarily equivalent
近似酉等价
1.
We prove that such two homomorphisms are approximately unitarily equivalent when they have the same induced maps on the invariant V(E1) and the quotient algebra, where K is the C*-algebra of all compact operators on a separable infinite dimensional Hilbert space and V(E1) is the commutative semigroup consisting of the Murray-von Ne.
设E1和E2为环面代数通过K的本质酉扩张,φ,ψ:E1→E2为单同态,若φ,ψ在半群V(E1)及商代数上导出的映射一致,则φ与ψ是近似酉等价的。
6) approximating solution
近似逼近解
1.
The finite dimension approximating solution for initial boundary value problem of coupling nonlinear system of hyperbolic equation is constructed by orthogonal basis of characteristic value sequence of the Laplace operator in the Dirichlet boundary conditions.
以 Laplace算子在 Dirichlet条件下的特征值序列为正交基底构造耦合非线性双曲型方程组初边值问题的有限维近似逼近解 ,证明该逼近解的一致收敛
补充资料：逼近
逼近
approximation
通近【即pm劝m浦门;anl平.院~u栩]，亦称近似 把一些数学对象用另一些在某种意义下与其相似的对象来代替，采用这种方法，可以把研究一个数学对象的数值特征和量的性质的问题，转化为研究另一些比较简单、比较方便的对象(例如具有容易计算的特征和已知性质的对象).在数论中，研究DioPhantus逼近，特别是研究用有理数逼近无理数.在几何学和拓扑学中，研究曲线、曲面、空间和映射的逼近.实际上，某些数学分支几乎专门研究逼近，例如函数逼近论和数值分析方法的理论.
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参考词条