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Maximally convergent rational approximants of meromorphic functions

Hans-Peter Blatt (2015)

Banach Center Publications

Let f be meromorphic on the compact set E ⊂ C with maximal Green domain of meromorphy E ρ ( f ) , ρ(f) < ∞. We investigate rational approximants r n , m of f on E with numerator degree ≤ n and denominator degree ≤ mₙ. We show that a geometric convergence rate of order ρ ( f ) - n on E implies uniform maximal convergence in m₁-measure inside E ρ ( f ) if mₙ = o(n/log n) as n → ∞. If mₙ = o(n), n → ∞, then maximal convergence in capacity inside E ρ ( f ) can be proved at least for a subsequence Λ ⊂ ℕ. Moreover, an analogue of Walsh’s...

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