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Algebraic varieties, stacks, sheaves, schemes, moduli spaces, complex geometry, quantum cohomology.

8 votes

What exactly does this diagram of Omar Khayyam represent?

You could not relate the equation $x^3+200x=20x^2+2000$ to the figures because, in fact, it does not originate from them. Here, Khayyam tries to find a point on the circle such that $ \frac{AE}{RH} = …
Amir Asghari's user avatar
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5 votes

Historical use of figures in geometry

You may enjoy Reviel Netz' book: The Shaping of Deduction in Greek Mathematics: A Study in Cognitive History. Cambridge: Cambridge University Press, 1999. It examines the use of letters diagrams in …
Amir Asghari's user avatar
  • 2,437