It is known, that the existence of dead ends (of arbitrary depth) in the Cayley graph of a group depends on the chosen set of generators. Nevertheless there exist many groups, which do not have dead… (More)

We define a pseudometric on the set of all unbounded subsets of a metric space. The Kolmogorov quotient of this pseudometric space is a complete metric space. The definition of the pseudometric is… (More)

HADES is a second-generation dilepton spectrometer for hadron and heavy ion physics ut the SlS Accelerator facility of GSI Darmstadt. Germany. The physics programme requires the detection of rare… (More)

The Second Level Trigger of the HADES (High Acceptance DiElectron Spectrometer) detector[1] is a very selective trigger[2] able to identify electron/positron pairs in a given invariant mass range. It… (More)

Linear and projective boundaries of Cayley graphs were introduced in [6] as quasi-isometry invariant boundaries of finitely generated groups. They consist of forward orbits g D 1g W i 2 No, or orbits… (More)