Talk:Penrose triangle
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I find it difficult to believe that this object was first devised by Roger Penrose. I would bet any of the classical Masters must have been aware of it, or at least, Projective Geometers, etc... To the point: the claim that Penrose was the inventor comes from what source? Thanks. Pfortuny 07:20, 13 Apr 2004 (UTC)
Lionel and Roger Penrose published a letter in the British Journal of Psychology regarding the triangle (the article is correct though, as it was Roger Penrose who came up with it). Whether they were the first inventors of it or not is irrelevent - if anyone else came up with it before, either they didn't bother to make others aware of its existence, or that knowledge was lost again. Average Earthman 07:37, 1 Jun 2004 (UTC)
- I've now found the cite - Penrose, Lionel and Roger Penrose, "Impossible objects: A Special Type of Visual Illusion," British Journal of Psychology, vol. 49, 1958, pp. 31-33
- OK, you piqued my interest, so I did a more thorough search on the web - and I've now found someone who came up with the triangle before them - Swedish artist Oscar Reutersvard, who drew 'impossible figures' in Japanese perspective. Apparently, neither Escher nor Penrose were aware of his work. Average Earthman 08:16, 1 Jun 2004 (UTC)