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Related theorems GIF version |
| Description: Deduction from transitivity of biconditional. Useful for converting conditional definitions in a formula. |
| Ref | Expression |
|---|---|
| 3bitr4d.1 | ⊢ (φ → (ψ ↔ χ)) |
| 3bitr4d.2 | ⊢ (φ → (θ ↔ ψ)) |
| 3bitr4d.3 | ⊢ (φ → (τ ↔ χ)) |
| Ref | Expression |
|---|---|
| 3bitr4d | ⊢ (φ → (θ ↔ τ)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3bitr4d.2 | . 2 ⊢ (φ → (θ ↔ ψ)) | |
| 2 | 3bitr4d.1 | . . 3 ⊢ (φ → (ψ ↔ χ)) | |
| 3 | 3bitr4d.3 | . . 3 ⊢ (φ → (τ ↔ χ)) | |
| 4 | 2, 3 | bitr4d 533 | . 2 ⊢ (φ → (ψ ↔ τ)) |
| 5 | 1, 4 | bitrd 530 | 1 ⊢ (φ → (θ ↔ τ)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 3 ↔ wb 146 |
| This theorem is referenced by: sbcom 1260 sbcom2 1336 sbcralt 1993 sbcralgf 1995 sbcel12g 2014 sbceqdig 2015 ordsucelsuc 3079 ordsucsssuc 3080 ordsucun 3088 fvopab3 3783 fvimacnvALT 3815 isotr 3903 isotrALT 3904 oaword 4189 omword 4207 om00el 4213 oeword 4223 brecop 4312 xpdom2 4448 omsucdom 4528 finsucdom 4532 finsucdomOLD 4533 alephord3 4889 ltsopi 5028 ltexpi 5041 ltapi 5042 ltmpi 5043 1idpr 5145 addcanpr 5164 pre-axltadd 5301 subsub23t 5388 axlttri 5515 lemul1t 5834 lediv1t 5853 lediv1tOLD 5854 lt2mul2divt 5874 lediv2t 5893 avglet 6046 nn0subt 6163 zltp1let 6183 qbtwnre 6279 ioonegt 6407 iccnegt 6408 fzaddelt 6501 fzrevt 6512 cj11t 6830 neiint 7716 islp2 7744 nvsubsub23 8278 nmorepnf 8427 shscomt 9278 spansncol 9486 cmcm2t 9554 hods 9696 eigpos 9757 nmoprepnf 9789 nmfnrepnf 9802 pjsspos 10095 cvcon3t 10206 mdsymlem8 10332 dmdsymt 10335 hmeobc 10528 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 |
| This theorem depends on definitions: df-bi 147 df-an 225 |