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arXiv · 1108.4403

Another proof of the $n!$ conjecture

Geir Ellingsrud·Stein Arild Strømme
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Abstract

The "n! conjecture" of Garsia and Haiman has inspired mathematicians for nearly two decades, even after Haiman published a proof in 2001. Kumar and Funch Thomsen proved in 2003 that in order to prove the conjecture for all partitions, it suffices to prove it for the so-called "staircase partitions" $(k,k-1,...,2,1)$ for each $k>1$. In the present paper we give a construction of a specially designed two-dimensional family of length-$n$ subschemes of the plane, and use that to prove the $n!$ conjecture for staircase partitions. Together with the result of Kumar and Funch Thomsen, this provides a new proof of Haiman's theorem.

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Geir Ellingsrud, Stein Arild Strømme. 2011-09-15. Another proof of the $n!$ conjecture. https://arxiv.org/abs/1108.4403

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