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Theorems of Korovkin and Stone-Weierstrass

1989
Let Δ = [a, b] be a closed interval in ℝ. The classical approximation theorem of Weierstrass (1885) asserts that any f ∈ C(Δ) can be approximated uniformly by polynomials, i.e., for any є > 0 there exists a polynomial Pє such that |f(x)–Pє (x) | < є holds for all x ∈ Δ.
openaire   +1 more source

Experimental quantum key distribution certified by Bell's theorem

Nature, 2022
David Nadlinger   +2 more
exaly  

An operator version of the Korovkin theorem revisited

Journal of Mathematical Analysis and Applications
Abderraouf Dorai
semanticscholar   +1 more source

Theorems of Korovkin type

Mathematical Notes of the Academy of Sciences of the USSR, 1976
openaire   +1 more source

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