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- Traian Nicolae Preda, Kjetil Uhlen, Dag Eirik Nordgård, Trond Toftevaag
- ISGT Europe
- 2012

- T. N. Preda, K. Uhlen, D. E. Nordgard
- 2012 3rd IEEE International Symposium on Power…
- 2012

Norwegian distribution power systems are often composed of long distribution lines supplying households, communities and small industrial customers. When a significant amount of load contains power electronics devices, the harmonic pollution of these grids becomes semnificative. As the share of distributed generators in these power systems is increasing… (More)

- Traian Preda, T. Preda
- 2012

Zuk's criterion give us a condition for a finitely generated group to have Property (T): the smallest non-zero eigenvalue of Laplace operator ∆µ corresponding to the simple random walk on G(S) satisfies λ1(G) > 1 2. We present here two examples that prove that this condition cannot be improved. Definition 1. (see [1] and [2]) i) A random walk or Markov… (More)

- Traian Nicolae Preda, Kjetil Uhlen, Dag Eirik Nordgård
- ISGT Europe
- 2013

- Traian Preda
- 2012

D. Kazhdan has introduced in 1967 the Property (T) for local compact groups (see [3]). In this article we prove that for n ≥ 3 and m ∈ N the group SLn(K) Mn,m(K) is a Kazhdan group having the outer automorphism group infinite. Definition 1. ([1]) Let (π, H) be a unitary representation of a topological group G. (i) For a subset Q of G and real number ε > 0,… (More)

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