Lebesgue Constant Using Sinc Points

Figure 5

Lebesgue function for Berrut’s first barycentric formula using Sinc points (1). The lower amplitude for and the higher amplitude for (a). Lebesgue constant for first barycentric Berrut form with different Sinc points. The dots represent the calculated Lebesgue constant by varying from to . The solid line represents the logarithmic least square fitting for these calculations as (b).

(a)

(b)