### Abstract

For a Hilbert space $H$, we study configurations of its subspaces related to Coxeter graphs $\mathbb{G}_{s_1,s_2}$, $s_1,s_2\in\{4,5\}$, which are arbitrary trees such that one edge has type~$s_1$, another one has type~$s_2$ and the rest are of type~$3$. We prove that such irreducible configurations exist only in a finite dimensional $H$, where the dimension of $H$ does not exceed the number of vertices of the graph by more than twice. We give a description of all irreducible nonequivalent configurations; they are indexed with a continuous parameter. As an example, we study irreducible configurations related to a graph that consists of three vertices and two edges of type $s_1$ and $s_2$.

### Full Text

### Article Information

Title | On *-representations of a class of algebras with polynomial growth related to Coxeter graphs |

Source | Methods Funct. Anal. Topology, Vol. 17 (2011), no. 3, 252-273 |

MathSciNet |
MR2857729 |

Copyright | The Author(s) 2011 (CC BY-SA) |

### Authors Information

*N. D. Popova*

Institute of Mathematics, National Academy of Sciences of Ukraine, 3 Tereshchenkivs'ka, Kyiv, 01601, Ukraine

*A. V. Strelets*

Institute of Mathematics, National Academy of Sciences of Ukraine, 3 Tereshchenkivs'ka, Kyiv, 01601, Ukraine

### Citation Example

N. D. Popova and A. V. Strelets, *On *-representations of a class of algebras with polynomial growth related to Coxeter graphs*, Methods Funct. Anal. Topology **17**
(2011), no. 3, 252-273.

### BibTex

@article {MFAT595,
AUTHOR = {Popova, N. D. and Strelets, A. V.},
TITLE = {On *-representations of a class of algebras with polynomial growth related to Coxeter graphs},
JOURNAL = {Methods Funct. Anal. Topology},
FJOURNAL = {Methods of Functional Analysis and Topology},
VOLUME = {17},
YEAR = {2011},
NUMBER = {3},
PAGES = {252-273},
ISSN = {1029-3531},
MRNUMBER = {MR2857729},
URL = {http://mfat.imath.kiev.ua/article/?id=595},
}