Tag Archives: Flag numbers

Euler’s Formula, Fibonacci, the Bayer-Billera Theorem, and Fine’s CD-index

Bill Gessley proving Euler’s formula (at UMKC) In the earlier post about Billerafest I mentioned the theorem of Bayer and Billera on flag numbers of polytopes. Let me say a little more about it. 1. Euler Euler’s theorem asserts that for … Continue reading

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