How do I know the length of a Weyl group element from its Weyl orbit result? For example, I know that $[2,2]$ under $s_1s_2s_1$ transforms into $[-2,-2]$,but given the result, how can I tell $l(s_1s_2s_1)=3$?
2026-04-24 08:36:42.1777019802
How do I know the length of a Weyl group element from its Weyl orbit result
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