e/Lebesgue constant

Information
has gloss	eng: Two kinds of constants are usually called Lebesgue constants (after Henri Lebesgue): * In the process of interpolation, the Lebesgue constants (with respect to a set of nodes) measure the precision of the polynomial interpolation at those nodes in regard with the best polynomial approximation. * In approximation theory, the Lebesgue constants are related to Fourier series.
lexicalization	eng: Lebesgue constant
instance of	e/Mathematical constant