Friedrich Littmann

most citedExtremal functions in de Branges and Euclidean spaces

22 citations · 22 across the 2 of their papers we have counts for

collaborators

2 papers

math.CA2016

Extremal Signatures

Friedrich Littmann, Mark Spanier

Let $E = A - i B$ be a Hermite-Biehler entire function of exponential type $τ /2$ where $A$ and $B$ are real entire, and consider $d μ (x) = d x /∣ E (x) ∣^{2}$ . We show that the sign of the p…

math.CA2014★ 22 cited

Extremal functions in de Branges and Euclidean spaces

Emanuel Carneiro, Friedrich Littmann

In this work we obtain optimal majorants and minorants of exponential type for a wide class of radial functions on $R^{N}$ . These extremal functions minimize the $L^1(\mathb…