Tino Ullrich

most citedThe Gelfand widths of

ℓ_{p}

-balls for

0 < p \leq 1

43 citations · 44 across the 3 of their papers we have counts for

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math.FA2010★ 1 cited

Continuous characterizations of Besov-Lizorkin-Triebel spaces and new interpretations as coorbits

Tino Ullrich

We give characterizations for homogeneous and inhomogeneous Besov-Lizorkin-Triebel spaces in terms of continuous local means for the full range of parameters. In particular, we pro…

math.FA2010

On Whitney type inequalities for local anisotropic polynomial approximation

D. Dinh, T. Ullrich

We prove a multivariate Whitney type theorem for the local anisotropic polynomial approximation in $L_{p} (Q)$ with $1 \leq p \leq \infty$ . Here $Q$ is a $d$ -parallelepiped in $\RR^d$ w…

math.FA2010★ 43 cited

The Gelfand widths of $ℓ_{p}$ -balls for $0 < p \leq 1$

Simon Foucart, Alain Pajor, Holger Rauhut +1

We provide sharp lower and upper bounds for the Gelfand widths of $ℓ_{p}$ -balls in the $N$ -dimensional $ℓ_{q}^{N}$ -space for $0 < p \leq 1$ and $p < q \leq 2$ . Such estimates are highly…

Continuous characterizations of Besov-Lizorkin-Triebel spaces and new interpretations as coorbits

On Whitney type inequalities for local anisotropic polynomial approximation

The Gelfand widths of ℓp​-balls for 0<p≤1

The Gelfand widths of $ℓ_{p}$ -balls for $0 < p \leq 1$