Unrestricted products of contractions in Banach spaces
Upper and Lower Bounds for Kronecker Constants of Three-Element Sets of Integers
Upper and lower estimates for schauder frames and atomic decompositions
Upper Beurling Density of Systems formed by Translates of finite Sets of Elements in $L^p(\R^d)$
Upper bound for isometric embeddings \ell_2^m\to\ell_p^n
Upper bounds for continuous seminorms and special properties of bilinear maps
Upper Semilattices of Finite-Dimensional Gauges
Upper Triangular Operator Matrices, SVEP and Browder. Weyl Theorems