*N.B. A detailed on-line essay by S. Finch
was the starting point for this entry.*

Define the th Lebesgue constant for the Lagrange Interpolating Polynomial by

(1) |

(2) |

(3) |

(4) |

**References**

Erdös, P. ``Problems and Results on the Theory of Interpolation, II.'' *Acta Math. Acad. Sci. Hungary* **12**, 235-244, 1961.

Finch, S. ``Favorite Mathematical Constants.'' http://www.mathsoft.com/asolve/constant/lbsg/lbsg.html

© 1996-9

1999-05-26