Media type: E-Article Title: A characterization by optimization of the orthocenter of a triangle Contributor: Hiriart-Urruty, Jean-Baptiste; Laurent, Pierre-Jean Published: European Mathematical Society - EMS - Publishing House GmbH, 2015 Published in: Elemente der Mathematik, 70 (2015) 2, Seite 45-48 Language: Not determined DOI: 10.4171/em/273 ISSN: 1420-8962; 0013-6018 Keywords: General Economics, Econometrics and Finance Origination: Footnote: Access State: Open Access