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JOURNALS // Symmetry, Integrability and Geometry: Methods and Applications // Archive

SIGMA, 2008 Volume 4, 072, 7 pp. (Mi sigma325)

This article is cited in 2 papers

A Jacobson Radical Decomposition of the Fano-Snowflake Configuration

Metod Sanigaa, Petr Pracnab

a Astronomical Institute, Slovak Academy of Sciences, SK-05960 Tatranská Lomnica, Slovak Republic
b J. Heyrovský Institute of Physical Chemistry, v.v.i., Academy of Sciences of the Czech Republic, Dolejškova 3, CZ-18223 Prague 8, Czech Republic

Abstract: The Fano-Snowflake, a specific configuration associated with the smallest ring of ternions $R_{\diamondsuit}$ (arXiv:0803.4436 and arXiv:0806.3153), admits an interesting partitioning with respect to the Jacobson radical of $R_{\diamondsuit}$. The totality of 21 free cyclic submodules generated by non-unimodular vectors of the free left $R_{\diamondsuit}$-module $R_{\diamondsuit}^3$ is shown to split into three disjoint sets of cardinalities 9, 9 and 3 according as the number of Jacobson radical entries in the generating vector is 2, 1 or 0, respectively. The corresponding “ternion-induced” factorization of the lines of the Fano plane sitting in the middle of the Fano-Snowflake is found to differ fundamentally from the natural one, i.e.  from that with respect to the Jacobson radical of the Galois field of two elements.

Keywords: non-unimodular geometry over rings; smallest ring of ternions; Fano plane.

MSC: 51C05; 51Exx

Received: July 14, 2008; in final form October 17, 2008; Published online October 24, 2008

Language: English

DOI: 10.3842/SIGMA.2008.072



Bibliographic databases:
ArXiv: 0807.1790


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