Template:Selected anniversaries/September 22
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1624: Math photographer Cantor Parabola publishes study of Renaissance-era crimes against mathematical constants.
1974: Physicist Winfried Otto Schumann dies. He predicted the existence of Schumann resonances, a series of low-frequency resonances caused by lightning discharges in the atmosphere.
1976: Mathematician and academic Shoshichi Kobayashi dies. He worked on Riemannian and complex manifolds, transformation groups of geometric structures, and Lie algebras.
2012: Mathematician, author, activist, and academic Irving Adler dies. He was a plaintiff in the McCarthy-era case Adler vs. Board of Education.