Hilbert's 15th Problem: Schubert Calculus | Infinite Series

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Crisis in the Foundation of Mathematics | Infinite Series
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In the late 1800s, a mathematician, Hermann Schubert, computed all sorts of wild enumerative geometry problems, like the number of twisted cubics tangent to 12 quadrics -- which is apparently 5,819,539,783,680. And maybe that exact number doesn’t seem particularly important -- but the fact that Schubert was able to figure it out it is pretty amazing.

Schubert Calculus, Kleiman and Laksov --
https://www.jstor.org/tc/accept?origi...
3264 and All That -- David Eisenbud and Joe Harris
The Honeycomb Model of GLn(C) Tensor Products II -- Knutson, Tao, Woodward -- THE HONEYCOMB MODEL OF GLn(C) TENSOR PRODUCTS II:

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