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June 7 Clip 2

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Videography by Jean-Baptiste Meilhan troubleshooting

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0:19:35 [add] $Z^w$.
0:28:45 [add] ${\mathcal A}^w$.
0:42:18 [add] PBW in the w-case.
0:52:34 [add] Wheels and trees.
0:52:42 [add] The Lie algebra structure on wheels and trees.