Results 31 to 36 of about 565 (36)

Wigner's theorem revisited

open access: yes, 2012
In this paper, we give the general solution of the functional equation $$\big\{\|f(x)+f(y)\|,\|f(x)-f(y)\|\big\}=\big\{\|x+y\|,\|x-y\|\big\}\qquad(x,y\in X)$$ where $f:X\to Y$ and $X,Y$ are inner product spaces. Related equations are also considered. Our
Maksa, Gyula, Páles, Zsolt
core   +1 more source

Random Geometric Graphs and Isometries of Normed Spaces [PDF]

open access: yes, 2015
Given a countable dense subset $S$ of a finite-dimensional normed space $X$, and ...
Balister, Paul   +4 more
core   +3 more sources

About the role of chaos and coarse graining in Statistical Mechanics

open access: yes, 2014
We discuss the role of ergodicity and chaos for the validity of statistical laws. In particular we explore the basic aspects of chaotic systems (with emphasis on the finite-resolution) on systems composed of a huge number of particles.Comment: Summer ...
Falasco, Gianmaria   +2 more
core   +1 more source

Property (T) and rigidity for actions on Banach spaces

open access: yes, 2005
We study property (T) and the fixed point property for actions on $L^p$ and other Banach spaces. We show that property (T) holds when $L^2$ is replaced by $L^p$ (and even a subspace/quotient of $L^p$), and that in fact it is independent of $1\leq ...
A. Connes   +59 more
core   +3 more sources

Baire spaces and infinite games [PDF]

open access: yes, 2014
It is well known that if the nonempty player of the Banach-Mazur game has a winning strategy on a space, then that space is Baire in all powers even in the box topology.
Galvin, Fred, Scheepers, Marion
core  

On the Mazur--Ulam theorem in fuzzy n--normed strictly convex spaces

open access: yes, 2009
In this paper, we generalize the Mazur--Ulam theorem in the fuzzy real n-normed strictly convex spaces.Comment: 7 ...
Abbaszadeh, S.   +2 more
core   +1 more source

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