Remarks on orthocenters, Pappus’ theorem and Butterfly theorems

Autor: Rudolf Fritsch
Rok vydání: 2015
Předmět:
Zdroj: Journal of Geometry. 107:305-316
ISSN: 1420-8997
0047-2468
DOI: 10.1007/s00022-015-0304-0
Popis: 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.
Databáze: OpenAIRE