## The generalizations of Newton's interpolation formula due to Mühlbach and Andoyer

C. Brezinski

### Abstract

Newton's formula for constructing the interpolation polynomial is well–known. It makes use of divided differences. It was generalized around 1971–1973 by Mühlbach for interpolation by a linear family of functions forming a complete Chebyshev system. This generalization rests on a generalization of divided differences due to Popoviciu. In this paper, it is shown that Mühlbach's formula is related to the work of Andoyer which goes back to the beginning of the century.

Full Text (PDF) [147 KB]

### Key words

interpolation, divided differences, biorthogonality.

65D05, 41A05.

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