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Zur Existenz gleichseitiger Dreiecke in H-Ebenen

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Abstract

It is shown, by indicating how to construct one with ruler and gauge, that there are equilateral triangles in absolutes planes which need not satisfy the circle axiom. However, it is not possible to construct an equilateral triangle with given base in absolute planes, even if they satisfy bachmann'sLotschnittaxiom or the Archimedean axiom.

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Literatur

  1. F. Bachmann, Zur Parallelenfrage, Abh. Math. Sem. Univ. Hamburg27 (1964), 173–192.

    Google Scholar 

  2. E. Becker, Euklidische Körper und euklidische Hüllen von Körpern, J. Reine. Angew. Math.268/269 (1974), 41–52.

    Google Scholar 

  3. L. Bröcker, Über eine Klasse pythagoreischer Körper, Arch. Math.23 (1972), 405–407.

    Google Scholar 

  4. R. Elman, T. Y. Lam, Quadratic forms over formally real fields and pythagorean fields, Amer. J. Math.94 (1972), 1155–1194.

    Google Scholar 

  5. H. G. Forder, On gauge constructions, Math. Gaz.23 (1939), 465–467.

    Google Scholar 

  6. M. J. Greenberg, Euclidean and non-Euclidean geometries, 3rd edition, Freeman, New York 1993.

    Google Scholar 

  7. S.Guber, Strecken- und Winkelübertragung mit Lineal und Eichmaß in der absoluten Geometrie, S.-Ber. math, -naturw. Kl. Bayer. Akad. Wiss. München, 251–261 (1960).

  8. H. N. Gupta, Contributions to the axiomatic foundations of geometry, Ph. D. Thesis, University of California, Berkeley, 1965.

    Google Scholar 

  9. G. Hessenberg, J. Diller, Grundlagen der Geometrie, W. de Gruyter, Berlin, 1967.

    Google Scholar 

  10. D. Hilbert, Grundlagen der Geometrie, 12. Auflage, B. G. Teubner, Stuttgart, 1977.

    Google Scholar 

  11. J.Hjelmslev, Die geometrischen Konstruktionen mittels Lineals und Eichmaßes, Opuscula mathematica Andreae Wiman dedicata (Festskrift Anders Wiman), Uppsala 1930, 175–177.

  12. T. Y. Lam, Orderings, Valuations and Quadratic Forms, CBMS 52, American Mathematical Society, Providence, 1983.

    Google Scholar 

  13. W. Pejas, Die Modelle des Hilbertschen Axiomensystems der absoluten Geometrie, Math. Ann.143 (1961), 212–235.

    Google Scholar 

  14. J. F. Rigby, Congruence axioms for absolute geometry, Math. Chronicle4 (1975), 13–44.

    Google Scholar 

  15. W. Schwabhäuser, W. Szmielew, A. Tarski, Metamathematische Methoden in der Geometrie, Springer-Verlag, Berlin, 1983.

    Google Scholar 

  16. P. Szász, New gauge constructions of perpendiculars without asuming the parallel axiom, Arch. Math.13 (1962), 147–150.

    Google Scholar 

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Pambuccian, V. Zur Existenz gleichseitiger Dreiecke in H-Ebenen. J Geom 63, 147–153 (1998). https://doi.org/10.1007/BF01221245

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  • DOI: https://doi.org/10.1007/BF01221245

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