Zobrazeno 1 - 10
of 189
pro vyhledávání: '"Johansen, Rune"'
Publikováno v:
In Journal of Infection and Public Health April 2024 17(4):719-726
We investigate polynomial endomorphisms of graph $C^*$-algebras and Leavitt path algebras. To this end, we define and analyze the coding graph corresponding to each such an endomorphism. We find an if and only if condition for the endomorphism to res
Externí odkaz:
http://arxiv.org/abs/1810.05230
Akademický článek
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Autor:
Johansen, Rune, Sørensen, Adam P. W.
We show that the Leavitt path algebras $L_{2,\mathbb{Z}}$ and $L_{2-,\mathbb{Z}}$ are not isomorphic as $*$-algebras. There are two key ingredients in the proof. One is a partial algebraic translation of Matsumoto and Matui's result on diagonal prese
Externí odkaz:
http://arxiv.org/abs/1507.01247
Autor:
Johansen, Rune
The Fischer, Krieger, and fiber product covers of sofic beta-shifts are constructed and used to show that every strictly sofic beta-shift is $2$-sofic. Flow invariants based on the covers are computed, and shown to only depend on an single integer ea
Externí odkaz:
http://arxiv.org/abs/1504.04966
Graph C*-algebras have been celebrated as C*-algebras that can be seen, because many important properties may be determined by looking at the underlying graph. This paper introduces the permutation graph for a permutative endomorphism of a graph C*-a
Externí odkaz:
http://arxiv.org/abs/1401.4274
Autor:
Johansen, Rune
Is every irreducible shift of finite type flow equivalent to a renewal system? For the first time, this variation of a classic problem formulated by Adler is investigated, and several partial results are obtained in an attempt to find the range of th
Externí odkaz:
http://arxiv.org/abs/1304.0888
Autor:
Johansen, Rune
The flow equivalence of sofic shifts is examined using results about the structure of the corresponding covers. A canonical cover generalising the left Fischer cover to arbitrary sofic shifts is introduced and used to prove that the left Krieger cove
Externí odkaz:
http://arxiv.org/abs/1210.3048