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# Tag Archives: Pappus’ Theorem

## Pappus and Diophantus

This post is inspired by a nice article by Adrian Rice and Ezra Brown in the latest BSHM Bulletin, titled “Commutativity and collinearity: a historical case study of the interconnection of mathematical ideas, Part II”. Pappus’ Theorem states that, if … Continue reading

Posted in exposition, history
Tagged Fano plane, Kirkman, Pappus' Theorem, Steiner triple system, two squares equality
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## Projective and polar spaces

I have produced a new edition of my lecture notes on Projective and Polar Spaces and put them with my lecture note collection. I did this because it seems that people still find some use for these notes. According to … Continue reading

Posted in history, open problems, the Web
Tagged Desargues' Theorem, LaTeX, LaTeX picture environment, Pappus' Theorem, plain TeX, polar spaces, projective spaces
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