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Related theorems GIF version |
| Description: A syllogism inference from two biconditionals. |
| Ref | Expression |
|---|---|
| syl6bb.1 | ⊢ (φ → (ψ ↔ χ)) |
| syl6bb.2 | ⊢ (χ ↔ θ) |
| Ref | Expression |
|---|---|
| syl6bb | ⊢ (φ → (ψ ↔ θ)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | syl6bb.1 | . 2 ⊢ (φ → (ψ ↔ χ)) | |
| 2 | syl6bb.2 | . . 3 ⊢ (χ ↔ θ) | |
| 3 | 2 | a1i 7 | . 2 ⊢ (φ → (χ ↔ θ)) |
| 4 | 1, 3 | bitrd 406 | 1 ⊢ (φ → (ψ ↔ θ)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 2 ↔ wb 127 |
| This theorem is referenced by: syl6rbb 415 syl6bbr 416 3bitr3g 427 biantrurd 546 19.33b 771 eqsal 833 axac 1085 cleqabd 1178 eqvinc 1407 eueq3 1430 reuxfr 1580 moabex 1868 eluniab 1926 elintab 1976 sotrieq2 2150 ordtri2 2233 ordtri4 2235 oneqmini 2272 ordtri2or 2328 ralxp 2456 opelcog 2511 opelcnvg 2517 dmsnop 2547 reldm0 2550 relrn0 2568 iss 2599 fvprc 2829 fnfvop 2856 fvopab3 2868 fvopabn 2873 elrnopab 2884 fsn 2895 fconstfv 2903 f1fv 2916 isocnv 2934 isoini 2938 f1oiso 2942 eloprabg 3035 elrnoprab 3054 caoprord2 3071 ecopoprsym 3246 th3qlem1 3250 dom2d 3307 mapsnen 3334 undom 3342 xpdom2 3345 pw2en 3348 mapdom2 3389 mapxpen 3390 xpmapenlem5 3395 unfilem1 3438 inf3lem1 3464 r1tr 3498 rankval2 3514 rankr1 3518 rankval3 3525 unbndrank 3527 r1pwcl 3530 bnd2 3549 aceq0 3553 aceq5lem4 3561 aceq5 3563 ac6lem 3575 kmlem14 3593 iscard2 3660 alephord2 3681 cardaleph 3690 zfcndac 3765 ltexpi 3823 mulcmpblnq 3847 ordpipq 3850 ltsopq 3869 genpelv 3897 genpprecl 3898 genpnnp 3902 genpass 3906 distrlem1pr 3921 distrlem5pr 3925 prlem936a 3947 addcmpblnr 3975 ltsrpr 3980 ltsosr 3997 mulgt0sr 4008 map2psrpr 4014 ltresr 4052 axrnegex 4080 axrrecex 4081 axltadd 4085 axmulgt0 4086 negcon2t 4168 lt0neg1t 4370 lt0neg2t 4371 le0neg1t 4372 le0neg2t 4373 ltmul2 4395 lemul1 4397 nngt1ne1t 4440 arch 4521 creur 4532 creui 4533 nn0ltp1let 4556 elznn0 4576 elnnz1 4581 elnn0nn 4593 zltp1let 4597 uzwo3lem2 4615 seqlem2 4663 sqr2irrlem3 4779 xpnnen 4927 infxpidmlem5 4937 infxpidmlem10 4942 ocelt 5162 ocsh 5164 chocuni 5179 shselt 5280 shscomt 5284 shmods 5363 elspan 5449 large 5700 mdbr2 5728 chrelat3t 5762 atnem0 5766 sumdmdi 5785 sumdmdlem 5786 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 |
| This theorem depends on definitions: df-bi 128 df-an 198 |