Random Runge approximation conjecture for holomorphic functions on compact sets

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Let K⊂CK\subset\mathbb C be compact, and let f(ω,z)f(\omega,z) be a random holomorphic function on KK. A sequence Rk(ω,z)R_k(\omega,z) of random rational functions should exist such that, for each ω\omega,

Rk(ω,⋅)→f(ω,⋅)R_k(\omega,\cdot)\rightarrow f(\omega,\cdot)

uniformly on KK.

Random Runge approximation conjecture. There is a sequence Rk(ω,z)R_k(\omega,z) of random rational functions such that, for each ω\omega, Rk(ω,⋅)→f(ω,⋅)R_k(\omega,\cdot)\rightarrow f(\omega,\cdot) uniformly on KK.

This is proposed as a stronger version of the preceding random Runge theorem, which assumes that f(ω,⋅)f(\omega,\cdot) is holomorphic on an open neighborhood UU of KK for every ω\omega. The conjecture seeks approximation under the weaker assumption of holomorphy on the compact set itself; its resolution is not given here.

References

Primary source

Simon St-Amant and Jérémie Turcotte, “Approximation by random complex polynomials and rational functions”, arXiv:1709.08240 (2017).

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