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Mirrors > Home > ILE Home > Th. List > syl6bbr | GIF version |
Description: A syllogism inference from two biconditionals. (Contributed by NM, 5-Aug-1993.) |
Ref | Expression |
---|---|
syl6bbr.1 | ⊢ (𝜑 → (𝜓 ↔ 𝜒)) |
syl6bbr.2 | ⊢ (𝜃 ↔ 𝜒) |
Ref | Expression |
---|---|
syl6bbr | ⊢ (𝜑 → (𝜓 ↔ 𝜃)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | syl6bbr.1 | . 2 ⊢ (𝜑 → (𝜓 ↔ 𝜒)) | |
2 | syl6bbr.2 | . . 3 ⊢ (𝜃 ↔ 𝜒) | |
3 | 2 | bicomi 131 | . 2 ⊢ (𝜒 ↔ 𝜃) |
4 | 1, 3 | syl6bb 195 | 1 ⊢ (𝜑 → (𝜓 ↔ 𝜃)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ↔ wb 104 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 |
This theorem depends on definitions: df-bi 116 |
This theorem is referenced by: 3bitr4g 222 bibi2i 226 equsalh 1704 eueq3dc 2858 sbcel12g 3017 sbceqg 3018 sbcnel12g 3019 reldisj 3414 r19.3rm 3451 rabxp 4576 elrng 4730 iss 4865 eliniseg 4909 fcnvres 5306 dffv3g 5417 funimass4 5472 fndmdif 5525 fneqeql 5528 funimass3 5536 elrnrexdmb 5560 dff4im 5566 fconst4m 5640 elunirn 5667 riota1 5748 riota2df 5750 f1ocnvfv3 5763 eqfnov 5877 caoftrn 6007 mpoxopovel 6138 rntpos 6154 ordgt0ge1 6332 iinerm 6501 erinxp 6503 qliftfun 6511 mapdm0 6557 elfi2 6860 fifo 6868 inl11 6950 ctssdccl 6996 isomnimap 7009 ismkvmap 7028 pr2nelem 7047 indpi 7150 genpdflem 7315 genpdisj 7331 genpassl 7332 genpassu 7333 ltnqpri 7402 ltpopr 7403 ltexprlemm 7408 ltexprlemdisj 7414 ltexprlemloc 7415 ltrennb 7662 letri3 7845 letr 7847 ltneg 8224 leneg 8227 reapltxor 8351 apsym 8368 suprnubex 8711 suprleubex 8712 elnnnn0 9020 zrevaddcl 9104 znnsub 9105 znn0sub 9119 prime 9150 eluz2 9332 eluz2b1 9395 nn01to3 9409 qrevaddcl 9436 xrletri3 9588 xrletr 9591 iccid 9708 elicopnf 9752 fzsplit2 9830 fzsn 9846 fzpr 9857 uzsplit 9872 fvinim0ffz 10018 lt2sqi 10380 le2sqi 10381 abs00ap 10834 iooinsup 11046 mertenslem2 11305 gcddiv 11707 algcvgblem 11730 isprm3 11799 eltg2b 12223 discld 12305 opnssneib 12325 restbasg 12337 ssidcn 12379 cnptoprest2 12409 lmss 12415 txrest 12445 txlm 12448 imasnopn 12468 bldisj 12570 xmeter 12605 bl2ioo 12711 limcdifap 12800 bj-sseq 12999 nnti 13191 |
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