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A classification of the projective lines over small rings

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  • Saniga, Metod
  • Planat, Michel
  • Kibler, Maurice R.
  • Pracna, Petr

Abstract

A compact classification of the projective lines defined over (commutative) rings (with unity) of all orders up to 31 is given. There are altogether 65 different types of them. For each type we introduce the total number of points on the line, the number of points represented by coordinates with at least one entry being a unit, the cardinality of the neighbourhood of a generic point of the line as well as those of the intersections between the neighbourhoods of two and three mutually distant points, the number of ‘Jacobson’ points per a neighbourhood, the maximum number of pairwise distant points and, finally, a list of representative/base rings. The classification is presented in form of a table in order to see readily not only the fine traits of the hierarchy, but also the changes in the structure of the lines as one goes from one type to the other. We hope this study will serve as an impetus to a search for possible applications of these remarkable geometries in physics, chemistry, biology and other natural sciences as well.

Suggested Citation

  • Saniga, Metod & Planat, Michel & Kibler, Maurice R. & Pracna, Petr, 2007. "A classification of the projective lines over small rings," Chaos, Solitons & Fractals, Elsevier, vol. 33(4), pages 1095-1102.
    • Handle: RePEc:eee:chsofr:v:33:y:2007:i:4:p:1095-1102
    DOI: 10.1016/j.chaos.2007.01.008
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    References listed on IDEAS

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    1. El Naschie, M. Saladin, 2006. "Advanced prerequisite for E-infinity theory," Chaos, Solitons & Fractals, Elsevier, vol. 30(3), pages 636-641.
    2. Marek-Crnjac, L., 2007. "E-infinity Cantorian space–time from subfactors and knot theory," Chaos, Solitons & Fractals, Elsevier, vol. 32(3), pages 916-919.
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