Mathematica evidence that Ramanujan kills Baker-Gammel-Wills
نویسندگان
چکیده
A 1961 conjecture of Baker, Gammel and Wills asserts that if a function f is meromorphic in the unit ball, and analytic at 0, then a subsequence of its diagonal Pade approximants converges uniformly in compact subsets omitting poles. Inasmuch as the denominators of the Padé approximants are complex orthogonal polynomials, and the convergence of sequences of Padé approximants is determined largely by the behaviour of their poles, the conjecture deals with distribution of zeros of complex orthogonal polynomials. In this paper, we present numerical evidence from the Mathematica package, that Ramanujan's continued fraction H q (z) = 1 + qzj j1 + q 2 zj j1 + q 3 zj j1 + ::: provides a counterexample, provided q is appropriately chosen on the unit circle.
منابع مشابه
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In 1961, Baker, Gammel and Wills conjectured that for functions f meromorphic in the unit ball, a subsequence of its diagonal Padé approximants converges uniformly in compact subsets of the ball omitting poles of f . There is also apparently a cruder version of the conjecture due to Padé himself, going back to the early twentieth century. We show here that for carefully chosen q on the unit cir...
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ورودعنوان ژورنال:
- Applied Mathematics and Computation
دوره 128 شماره
صفحات -
تاریخ انتشار 2002