Operators with extension property and the principle of local reflexivity

Optimal Convergence Rates for Tikhonov Regularization in Besov Scales

Optimal Decompositions of Translations of $L^{2}$-functions

Optimal domain for the Hardy operator

Optimal dual frames and frame completions for majorization

Optimal frames and Newton's method

Optimal growth of frequently hypercyclic entire functions

Optimal limiting embeddings for $Δ$-reduced Sobolev spaces in $L^1$

Optimal lower bounds on the maximal p-negative type of finite metric spaces

Optimal polynomial decay of functions and operator semigroups

Optimal reconstruction systems for erasures and for the q-potential

Optimal regularization processes on complete Riemannian manifolds

Optimal solutions to matrix-valued Nehari problems and related limit theorems

Optimal weak type estimates for dyadic-like maximal operators

Optimal Young's inequality and its converse:a simple proof

Orbital theories of outer planet satellites

Orbits in symmetric spaces

Orbits in symmetric spaces, II

Orbits of linear operators and Banach space geometry

Orbits of non-elliptic disc automorphisms