A Formula for the Fréchet Derivative of a Generalized Matrix Function
A Formula for the Fréchet Derivative of a Generalized Matrix Function
复制标题
广义矩阵函数Fréchet导数的公式
DOI:
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发表时间:
2017
影响因子:
1.5
通讯作者:
V. Noferini
中科院分区:
文献类型:
--
作者:
V. Noferini
We state and prove an analogue of the Daleckii--Krein theorem, thus obtaining an explicit formula for the Frechet derivative of generalized matrix functions. Moreover, we prove the differentiability of generalized matrix functions of real matrices under very mild assumptions. For complex matrices, we argue that, under the same assumptions, generalized matrix functions are real-differentiable but generally not complex-differentiable. Finally, we discuss the application of our results to the study of the condition number of generalized matrix functions. Along our way, we also derive generalized matrix functional analogues of a few classical theorems on polynomial interpolation of classical matrix functions and their derivatives.
影响因子:
1.5
作者:
Arslan B
通讯作者:
Arslan B