-@(lfsx_ind … (csx_lfsx … HT0)) -L0
-#L0 #_ #IHd #H10 #IHu @fsb_intro
-#G2 #L2 #T2 * -G2 -L2 -T2 [ -IHd -IHc | -IHu -IHd | ]
-[ /4 width=5 by fpbs_fqup_trans, fqu_fqup/
-| #T2 #HT02 #HnT02
- elim (fpbs_cpx_tdneq_trans … H10 … HT02 HnT02) -T0
- /3 width=4 by/
-| #L2 #HL02 #HnL02 @(IHd … HL02 HnL02) -IHd -HnL02 [ -IHu -IHc | ]
- [ /3 width=3 by fpbs_lfpxs_trans, lfpx_lfpxs/
- | #G3 #L3 #T3 #H03 #_
- elim (lfpx_fqup_trans … H03 … HL02) -L2 #L4 #T4 #HT04 #H43 #HL43
- elim (tdeq_dec h o T0 T4) [ -IHc -HT04 #HT04 | -IHu #HnT04 ]
- [ elim (tdeq_fqup_trans … H43 … HT04) -T4 #L2 #T4 #H04 #HT43 #HL24
- /4 width=7 by fsb_fpbs_trans, tdeq_lfdeq_lfpx_fpbs, fpbs_fqup_trans/
- | elim (cpxs_tdneq_fwd_step_sn … HT04 HnT04) -HT04 -HnT04 #T2 #T5 #HT02 #HnT02 #HT25 #HT54
- elim (fpbs_cpx_tdneq_trans … H10 … HT02 HnT02) -T0 #T0 #HT10 #HnT10 #H02
- /3 width=14 by fpbs_cpxs_tdeq_fqup_lfpx_trans/
+@(rsx_ind … (csx_rsx … HT0)) -L0 #L0 #_ #IHd #H10 #IHu
+@fsb_intro #G2 #L2 #T2 #H
+elim (fpbc_fwd_lpx … H) -H * [ -IHd -IHc | -IHu -IHd |]
+[ /5 width=5 by fsb_fpb_trans, fpbs_fqup_trans, fqu_fqup/
+| #T3 #HT03 #HnT03 #H32
+ elim (fpbs_cpx_tneqg_trans … H10 … HT03 HnT03) -T0
+ /4 width=5 by fsb_fpb_trans, sfull_dec/
+| #L3 #HL03 #HnL03 #HL32
+ @(fsb_fpb_trans … HL32) -L2
+ @(IHd … HL03 HnL03) -IHd -HnL03 [ -IHu -IHc |]
+ [ /3 width=3 by fpbs_lpxs_trans, lpx_lpxs/
+ | #G4 #L4 #T4 #H04 #_
+ elim (lpx_fqup_trans … H04 … HL03) -L3 #L3 #T3 #HT03 #H34 #HL34
+ elim (teqx_dec T0 T3) [ -IHc -HT03 #HT03 | -IHu #HnT03 ]
+ [ elim (teqg_fqup_trans … H34 … HT03) -T3 // #L2 #T3 #H03 #HT34 #HL23
+ /4 width=10 by fsb_fpbs_trans, teqg_reqg_lpx_fpbs, fpbs_fqup_trans/
+ | elim (cpxs_tneqg_fwd_step_sn … HT03 HnT03) -HT03 -HnT03 /2 width=1 by sfull_dec/ #T2 #HT02 #HnT02 #HT23
+ elim (fpbs_cpx_tneqg_trans … H10 … HT02 HnT02) -T0 /2 width=1 by sfull_dec/ #T0 #HT10 #HnT10 #H02
+ /3 width=17 by fpbs_cpxs_teqg_fqup_lpx_trans/