Browsing 2014 by Title
Now showing items 15-19 of 19
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Spectral triples and finite summability on Cuntz-Krieger algebras
[OWP-2014-03] (Mathematisches Forschungsinstitut Oberwolfach, 2014-05-13)We produce a variety of odd bounded Fredholm modules and odd spectral triples on Cuntz-Krieger algebras by means of realizing these algebras as "the algebra of functions on a non-commutative space" coming from a sub shift ... -
Spherical Actions on Flag Varieties
[OWP-2014-04] (Mathematisches Forschungsinstitut Oberwolfach, 2014-04-25)For every finite-dimensional vector space $V$ and every $V$ -flag variety $X$ we list all connected reductive subgroups in $GL(V)$ acting spherically on $X$. -
Square wave periodic solutions of a differential delay equation
[OWP-2014-09] (Mathematisches Forschungsinstitut Oberwolfach, 2014-05-13)We prove the existence of periodic solutions of the differential delay equation $\varepsilon\dot{x}(t) + x(t)= f(x(t-1)), \varepsilon>0$ under the assumptions that the continuous nonlinearity $f(x)$ satisfies the negative ... -
Varieties of Invariant Subspaces Given by Littlewood-Richardson Tableaux
[OWP-2014-01] (Mathematisches Forschungsinstitut Oberwolfach, 2014-04-25)Given partitions $\alpha, \beta, \gamma$, the short exact sequences $0 \rightarrow N_\alpha \rightarrow N_\beta \rightarrow N_\gamma \rightarrow 0$ of nilpotent linear operators of Jordan types $\alpha, \beta, \gamma$, ... -
Weak Expansiveness for Actions of Sofic Groups
[OWP-2014-05] (Mathematisches Forschungsinstitut Oberwolfach, 2014-04-25)In this paper, we shall introduce $h$-expansiveness and asymptotical $h$-expansiveness for actions of sofic groups. By the definitions, each h-expansive action of sofic groups is asymptotically $h$-expansive. We show that ...