Prof. Orna Harari

Department of Philosophy
Department of Classics
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Prof. Orna Harari
Phone: 03-6409779
Office: Gilman-humanities, 457


Her interests lie in ancient logic, proof-theory, and mathematics. Her current work focuses on the reception of Aristotle's theory of demonstration in the ancient commentary tradition. In her published works she studied topics such as the logical role of geometrical constructions, ancient philosophical accounts of constructions and diagrammatic reasoning, the relationship between proof and explanation, relational attributes, and the epistemic status of the principles of proof.



BA, The University of Haifa, 1993

MA, The University of Haifa, 1996

PhD (summa cum laude), Tel Aviv University, 2001

Academic Appointments

 Teaching Fellow, The University of Haifa,1996-2000.

 Visiting Professor, École des Hautes Études en Sciences Social, Paris, 2001.  

 Teaching Fellow, The Department of Classics, Tel-Aviv University, 2002-2004.

Teaching Fellow, The Department of Classics, The Hebrew University of Jerusalem, 2004-2005

2004-2011: Lecturer, The Department of Classics and The Department of Philosophy, Tel Aviv University, 2004-2011.

Senior Lecturer, The Department of Classics and The Department of Philosophy, Tel Aviv University, starting 2011.

 Fellowships and Awards

Post Doctoral Fellow, The Dibner Institute MIT, Cambridge Massachusetts, 2000-2002.

Post Doctoral Fellow, Sidney M. Edelstein Center for History and Philosophy of Science,  The Hebrew University of Jerusalem, 2001-2003.

2002-2004 Koret Fellowship, Tel-Aviv University, 2002-2004.

The Shlomo Pines Prize, The Hebrew University of Jerusalem, 2004.

Alon Fellowship, Tel-Aviv University, 2005-2008.

The Young Scholars Forum  of the Israel Academy of Sciences and Humanities, 2008-2009.

Fellow, Wissenschftskolleg zu Berlin, 2009-2010.

Academic Activities

Secretary of the Israel Society for the Promotion of Classical Studies, 2006-2009.

Editor in Chief, Science in Context, starting 2011.

Editorial and Reviewing

Archiv für Geschichte der Philosophie, 2008.

 The Institute for Advanced Study, the Hebrew University of Jerusalem, 2008

 Synthese, 2009.

 Journal of the American Musicological Society, 2010.

Ancient Philosophy, 2010

Historia Mathematica, 2011







Select Publications


2004, Knowledge and Demonstration: Aristotle’s Posterior Analytics, New Synthese Historical Library, Kluwer Academic Publishers.

2010 (paperback), Knowledge and Demonstration: Aristotle’s Posterior Analytics, New Synthese Historical Library, Kluwer Academic Publishers.


2001, 'Knowledge and Explanation in Aristotle’s Posterior Analytics' in: Hon, G. & Rakover, S,  Kluwer Academic Publishers, Dordrecht, pp. 137-164.

2003, 'The Concept of Existence and the Role of Constructions in Euclid’s Elements', Archive for History of Exact Sciences 57, 1-23.

2006, 'Aristotle on Inferences from False Premises' (in Hebrew), Metaphora 6, 49-61

2006, 'Methexis and Geometrical Reasoning in Proclus Commentary on Euclid’s Elements', Oxford Studies in Ancient Philosophy 30, 361-389.

 2006, Review Article on: Taisbak, Christian Marinus, (trans & comm.), Euclid’s Data: The Importance of Being Given, The International Journal of the Classical Tradition, 12/4, 651-654.

2008, 'Proclus' Account of Explanatory Demonstrations in Mathematics and its Context', Archiv für Geschichte der Philosophie 90/2, 137-164.

2009, 'Simplicius on the Reality of Relations and Relational Change', Oxford Studies in Ancient Philosophy 37, 245-274.

2010, 'Le preuves démonstratives dans le commentaire de Proclus au premier livre des Eléments d'Euclid', in Lernould, A. (ed.), Études sur le commentaire de Proclus au primier livre des Éléments d'Euclid, Presses universitaires du Septentrion, 197-214.

2011, 'The Unity of Aristotle's Category of Relatives', Classical Quarterly 61/2, 521-537.

2012, 'Simplicius on Tekmeriodic proofs', Studies in History and Philosophy of Science 43, 366-375.

2012,  'John Philoponus and the Conformity of Mathematical Proofs to Aristotelian Demonstration', in Chemla, K. (ed.) The History of Mathematical Proofs in Ancient Traditions. Cambridge University Press, 206-227.

 2012, Review article on Theophrastus of Eresus Commentary Volume 6.1: Sources on Ethics by William W. Fortenbaugh, with Contributions on the Arabic Material by Dimitri Gutas. Leiden: Brill 2011, Scripta Classica Israelica, 31, 203-205.

 2013, 'The Principles of Demonstration and Tekmeriodic Proofs in the Late-Antique Commentary Tradition', Revue de Synthèse, 134/6, 246-266.

forthcoming, 'Philosophy or History? The Historiography of Ancient Philosophy' (in Hebrew), Proceedings of the Israel Academy for the Sciences and Humanities.

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