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 Hopf fibration double covers circle bundle of sphere
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 A simple proof of the GaussBonnet theorem for geodesic ball
 Complex analysis  Problem solving strategies.
 Fourier coefficients as eigenvalues/spectrum
 Archimedes and the area of sphere
 "Useless" Circle Properties: The Green Flash In Mathematics
 The CauchySchwarz inequality and the Lagrange identity
 Hopf fibration double covers circle bundle of sphere
 Fourier Analysis and Number theory I: The selfdual function e^{\pi x^2}
 SLemma
 Sobolev and Isoperimetric Inequality
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