Spin norm, pencils, and the u-small convex hull

Dong, Chao-Ping

doi:10.1090/proc/12798

Spin norm, pencils, and the u-small convex hull
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Proc. Amer. Math. Soc. 144 (2016), 999-1013 Request permission

Abstract:

Let $\mathfrak {g}$ be any finite-dimensional complex simple Lie algebra. In this paper, we show that the spin norm increases strictly along any pencil once it goes beyond the u-small convex hull of $\mathfrak {g}$.

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