| @(mq … H1M) [4,5: /3 width=2 by seq_sym, me/ |1,2: skip ]
/2 width=1 by/
]
-| #G #L #V #U1 #U2 #T2 #_ #IH #HTU2 #gv #lv #Hlv
+| #G #L #V #U1 #T1 #T2 #HTU1 #_ #IH #gv #lv #Hlv
@(mq … H1M)
[4: /3 width=2 by seq_sym, md/ | skip
|3: @(seq_trans … H1M) [2: @mz // | skip ]
- /3 width=1 by li_abbr/
- |2: skip ] -L -U1
- /3 width=1 by lifts_SO_fwd_vpush, seq_sym/
+ ] /3 width=3 by lifts_SO_fwd_vpush, seq_sym/
| #G #L #V #T1 #T2 #_ #IH #gv #lv #Hlv
@(seq_trans … H1M) [2: @(me … H1M) | skip ]
/2 width=1 by/