A unified theory for real vs.\ complex rational Chebyshev approximation on an interval

Arden Ruttan, Richard S. Varga
1989 Transactions of the American Mathematical Society  
A unified approach is presented for determining all the constants Im.n (m > 0, n > 0) which occur in the study of real vs. complex rational Chebyshev approximation on an interval. In particular, it is shown that 3Vm+2 = 1/3 (m > 0), a problem which had remained open.
doi:10.1090/s0002-9947-1989-0948196-7 fatcat:xdxothic6zduflszu7ffrxqdeu