Original language | English (US) |
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Pages (from-to) | 333-351 |
Number of pages | 19 |
Journal | Journal of Approximation Theory |
Volume | 21 |
Issue number | 4 |
DOIs | |
State | Published - Dec 1977 |
Bibliographical note
Funding Information:* Supported by NSF Grant GP-28933. This paper is an extended version of a talk given at the NATO Advanced Study Institute on Scattering Theory in Mathematics and Physics, Denver, Colorado, June 1973.