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Approximation by Ratios of Bounded Analytic Functions

✍ Scribed by Daniel Suárez


Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
306 KB
Volume
160
Category
Article
ISSN
0022-1236

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📜 SIMILAR VOLUMES


Approximation of analytic functions by r
✍ Gaetano Fichera 📂 Article 📅 1970 🏛 John Wiley and Sons 🌐 English ⚖ 473 KB

From (1) it follows that y ( z ) has in zk a zero of order not less than vk . Since y ( z ) is holomorphic in the neighborhood of every point of %'K (including z = a), it follows from Hypothesis 6, that y ( z ) vanishes identically in VK. On the other hand, we have for large IzJ of 5. 1 We say tha

Approximation by Analytic Matrix Functio
✍ V.V. Peller; S.R. Treil 📂 Article 📅 1997 🏛 Elsevier Science 🌐 English ⚖ 485 KB

The four block problem is a generalization of Nehari's problem for matrix functions. It plays an important role in H -optimal control theory. It is well known that Nehari's problem for a continuous scalar function has a unique solution. However, in the matrix case the situation is quite different. V