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Transactions of the American Mathematical Society

ISSN 1088-6850(online) ISSN 0002-9947(print)

 

 

Complex approximation of real functions by reciprocals of polynomials


Author: Daniel Wulbert
Journal: Trans. Amer. Math. Soc. 316 (1989), 635-652
MSC: Primary 41A20
DOI: https://doi.org/10.1090/S0002-9947-1989-0967318-5
MathSciNet review: 967318
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Abstract: Characterizations are given for local and global best rational approximations to a real function. The characterizations are specialized to reciprocals of polynomials, where they are used to settle some conjectures and questions.


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DOI: https://doi.org/10.1090/S0002-9947-1989-0967318-5
Article copyright: © Copyright 1989 American Mathematical Society