Remarks on orthocenters, Pappus' theorem and Butterfly theorems

Fritsch, Rudolf (2016): Remarks on orthocenters, Pappus' theorem and Butterfly theorems. In: Journal of Geometry, Bd. 107, Nr. 2: S. 305-316

Abstract

We present a generalization of the notion of the orthocenter of a triangle and of Pappus' theorem. Both subjects were discussed with Pickert in the last year of his life. Furthermore we add a projective Butterfly theorem which covers all known affine cases.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Mathematik, Informatik und Statistik > Mathematik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 510 Mathematik
• ISSN: 0047-2468
• Sprache: Englisch