𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Quasi-isometries in semi-Hilbertian spaces

✍ Scribed by Laurian Suciu


Publisher
Elsevier Science
Year
2009
Tongue
English
Weight
212 KB
Volume
430
Category
Article
ISSN
0024-3795

No coin nor oath required. For personal study only.


πŸ“œ SIMILAR VOLUMES


Partial isometries in semi-Hilbertian sp
✍ M. Laura Arias; Gustavo Corach; M. Celeste Gonzalez πŸ“‚ Article πŸ“… 2008 πŸ› Elsevier Science 🌐 English βš– 195 KB
-Isometries in Euclidean spaces
✍ Igor A. Vestfrid πŸ“‚ Article πŸ“… 2005 πŸ› Elsevier Science 🌐 English βš– 128 KB

Let 0 < r R and A be a subset of the n-dimensional Euclidean space E n , which is contained in B(x 0 , R) and contains points x 0 , x 0 + re 1 , . . . , x 0 + re n , where the vectors {e i } n i=1 are orthonormal. We show that if f : A β†’ E n is an -isometry, then there is an affine isometry U such t

Nonlinear Isometries in Superreflexive S
✍ W.A. Kirk; Brailey Sims πŸ“‚ Article πŸ“… 1996 πŸ› Elsevier Science 🌐 English βš– 107 KB

We extend Maurey's theorem on the existence of a fixed point for an isometry of a nonempty closed bounded convex subset of a superreflexive space to obtain the existence of common fixed points for countable families of commuting isometries.

On isometries in Lp spaces
✍ Juan Carlos Merlo πŸ“‚ Article πŸ“… 1975 πŸ› Elsevier Science 🌐 English βš– 147 KB
Semi-Lipschitz Functions and Best Approx
✍ Salvador Romaguera; Manuel Sanchis πŸ“‚ Article πŸ“… 2000 πŸ› Elsevier Science 🌐 English βš– 128 KB

We show that the set of semi-Lipschitz functions, defined on a quasi-metric space (X, d ), that vanish at a fixed point x 0 # X can be endowed with the structure of a quasi-normed semilinear space. This provides an appropriate setting in which to characterize both the points of best approximation an