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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 1705 eueq3dc 2862 sbcel12g 3022 sbceqg 3023 sbcnel12g 3024 reldisj 3419 r19.3rm 3456 eldifpr 3559 eldiftp 3577 rabxp 4584 elrng 4738 iss 4873 eliniseg 4917 fcnvres 5314 dffv3g 5425 funimass4 5480 fndmdif 5533 fneqeql 5536 funimass3 5544 elrnrexdmb 5568 dff4im 5574 fconst4m 5648 elunirn 5675 riota1 5756 riota2df 5758 f1ocnvfv3 5771 eqfnov 5885 caoftrn 6015 mpoxopovel 6146 rntpos 6162 ordgt0ge1 6340 iinerm 6509 erinxp 6511 qliftfun 6519 mapdm0 6565 elfi2 6868 fifo 6876 inl11 6958 ctssdccl 7004 isomnimap 7017 ismkvmap 7036 iswomnimap 7048 omniwomnimkv 7049 pr2nelem 7064 indpi 7174 genpdflem 7339 genpdisj 7355 genpassl 7356 genpassu 7357 ltnqpri 7426 ltpopr 7427 ltexprlemm 7432 ltexprlemdisj 7438 ltexprlemloc 7439 ltrennb 7686 letri3 7869 letr 7871 ltneg 8248 leneg 8251 reapltxor 8375 apsym 8392 suprnubex 8735 suprleubex 8736 elnnnn0 9044 zrevaddcl 9128 znnsub 9129 znn0sub 9143 prime 9174 eluz2 9356 eluz2b1 9422 nn01to3 9436 qrevaddcl 9463 xrletri3 9618 xrletr 9621 iccid 9738 elicopnf 9782 fzsplit2 9861 fzsn 9877 fzpr 9888 uzsplit 9903 fvinim0ffz 10049 lt2sqi 10411 le2sqi 10412 abs00ap 10866 iooinsup 11078 mertenslem2 11337 gcddiv 11743 algcvgblem 11766 isprm3 11835 eltg2b 12262 discld 12344 opnssneib 12364 restbasg 12376 ssidcn 12418 cnptoprest2 12448 lmss 12454 txrest 12484 txlm 12487 imasnopn 12507 bldisj 12609 xmeter 12644 bl2ioo 12750 limcdifap 12839 bj-sseq 13170 nnti 13362 pw1nct 13371 |
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