A thirteenth century 'proof' of the parallel postulate

Sabetai Unguru

doi:10.1016/0315-0860(78)90051-4

A thirteenth century 'proof' of the parallel postulate

Sabetai Unguru^*

^*Corresponding author for this work

University of Oklahoma

Research output: Contribution to journal › Article › peer-review

Abstract

Proposition I.14 of Witelo's Perspectiva purports to provide a proof of the claim contained in Euclid's fifth postulate. The Latin text of the proposition is presented and translated into English; a commentary on the nature of the 'proof' is also provided.

Original language	English
Pages (from-to)	205-210
Number of pages	6
Journal	Historia Mathematica
Volume	5
Issue number	2
DOIs	https://doi.org/10.1016/0315-0860(78)90051-4
State	Published - May 1978
Externally published	Yes

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A thirteenth century 'proof' of the parallel postulate

Abstract

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