Results 21 to 30 of about 700 (42)
IFSs consisting of generalized convex contractions
Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2017 In this paper we introduce the concept of iterated function system consisting of generalized convex contractions. More precisely, given n ∈ ℕ*, an iterated function system consisting of generalized convex contractions on a complete metric space (X; d) is
Georgescu Flavian
doaj +1 more source
A note on dimensional entropy for amenable group actions
, 2017 In this short note, for countably infinite amenable group actions, we provide topological proofs for the following results: Bowen topological entropy (dimensional entropy) of the whole space equals the usual topological entropy along tempered F{\o}lner ...
Dou, Dou, Zhang, Ruifeng
core +1 more source
Standardization for Defence Procurement - European Handbook : CEN Workshop 10 [PDF]
, 2005 The European Commission (EC), DG Enterprise, endeavours the competitiveness of the European Defence Industry. The plethora of (national) standards, more than 10.000, are recognised by the EC as a major constraint and cost driver.
Bresson, Alain +23 more
core +1 more source
J-class weighted shifts on the space of bounded sequences of complex numbers
, 2008 We provide a characterization of $J$-class and $J^{mix}$-class unilateral weighted shifts on $l^{\infty}(\mathbb{N})$ in terms of their weight sequences. In contrast to the previously mentioned result we show that a bilateral weighted shift on $l^{\infty}
Costakis, George, Manoussos, Antonios
core +1 more source
Compactification of a map which is mapped to itself [PDF]
, 2002 We prove that if $T: X \to X$ is a selfmap of a set $X$ such that $\bigcap \{T^{n}X: n\in N}\}$ is a one-point set, then the set $X$ can be endowed with a compact Hausdorff topology so that $T$ is continuous.Comment: 5 ...
Iwanik, A., Janos, L., Smith, F. A.
core +1 more source
Metrizable universal minimal flows of Polish groups have a comeagre orbit
, 2017 We prove that, whenever $G$ is a Polish group with metrizable universal minimal flow $M(G)$, there exists a comeagre orbit in $M(G)$. It then follows that there exists an extremely amenable, closed, coprecompact $G^*$ of $G$ such that $M(G) = \hat{G/G^*}$
Melleray, Julien +2 more
core +2 more sources
Topological Quantum Field Theory And Strong Shift Equivalence
, 1998 Given a TQFT in dimension d+1, and an infinite cyclic covering of a closed (d+1)-dimensional manifold M, we define an invariant taking values in a strong shift equivalence class of matrices.
Blanchet +8 more
core +4 more sources
Energy conditions in f(T) gravity with higher-derivative torsion terms
, 2017 We study the energy conditions in the framework of the modi- fied gravity with higher-derivative torsional terms in the action. We discuss the viability of the model by studying the energy conditions in terms of the cosmographical parameters like Hubble,
Azizi, Tahereh, Gorjizadeh, Miysam
core +1 more source
Statistical mechanics of voting
, 1998 Decision procedures aggregating the preferences of multiple agents can produce cycles and hence outcomes which have been described heuristically as `chaotic'.
B. Hasslacher +36 more
core +3 more sources
Construction of minimal non-invertible skew-product maps on 2-manifolds
, 2014 Applying the Hric-J\"ager blow up technique, we give an affirmative answer to the question about the existence of non-invertible minimal circle-fibered self-maps of the Klein bottle.
Trofimchuk, Sergei, Šotola, Jakub
core +1 more source