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June 13 Clip 1

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Videography by Karene Chu troubleshooting

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0:20:29 [add] Options for June 13.
0:30:20 [add] More conventions talk.
0:37:01 [add] The three forms of the u->w map.
0:57:22 [add] The $\beta$ relation and other internal quotients.
1:30:49 [add] $J$, $K$, wheeling and dewheeling.
1:36:22 [add] $\chi$ and $\chi^{ss}$.