Jussi Laitila

activity

20102016

most citedRigidity of composition operators on the Hardy space

H^{p}

13 citations · 17 across the 6 of their papers we have counts for

collaborators

7 papers

math.FA2016★ 13 cited

Rigidity of composition operators on the Hardy space $H^{p}$

Jussi Laitila, Pekka J. Nieminen, Eero Saksman +1

Let $ϕ$ be an analytic map taking the unit disk $D$ into itself. We establish that the class of composition operators $f \mapsto C_{ϕ} (f) = f \circ ϕ$ exhibits a rather stro…

math.OC2015

New performance guarantees for the greedy maximization of submodular set functions

Jussi Laitila, Atte Moilanen

We present new tight performance guarantees for the greedy maximization of nondecreasing submodular set functions. Our main result first provides a performance guarantee in terms o…

math.FA2015★ 1 cited

Composition operators on vector-valued analytic function spaces: a survey

Jussi Laitila, Hans-Olav Tylli

We survey recent results about composition operators induced by analytic self-maps of the unit disk in the complex plane on various Banach spaces of analytic functions taking value…

math.FA2014

Weighted composition operators between weak spaces of vector-valued analytic functions

Mostafa Hassanlou, Jussi Laitila, Hamid Vaezi

We consider weighted composition operators on spaces of analytic functions on the unit disc, which take values in some complex Banach space. We provide necessary and sufficient con…

math.FA2013

The essential norm of a weighted composition operator on BMOA

Jussi Laitila, Mikael Lindström

We provide an estimate for the essential norm of a weighted composition operator $W_{ψ, φ} : f \mapsto ψ (f \circ φ)$ acting on the space $B M O A$ in terms of the weight function $ψ$ …

math.FA2011

Weak compactness and essential norms of integration operators

Jussi Laitila, Santeri Miihkinen, Pekka J. Nieminen

Let $g$ be an analytic function on the unit disc and consider the integration operator of the form $T_{g} f (z) = \int_{0}^{z} f g^{'} d ζ$ . We show that on the spaces $H^{1}$ and $B M O A$ the op…

math.FA2010★ 3 cited

Compact and weakly compact composition operators on BMOA