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Mirrors > Home > ILE Home > Th. List > 3imtr4i | GIF version |
Description: A mixed syllogism inference, useful for applying a definition to both sides of an implication. (Contributed by NM, 5-Aug-1993.) |
Ref | Expression |
---|---|
3imtr4.1 | ⊢ (𝜑 → 𝜓) |
3imtr4.2 | ⊢ (𝜒 ↔ 𝜑) |
3imtr4.3 | ⊢ (𝜃 ↔ 𝜓) |
Ref | Expression |
---|---|
3imtr4i | ⊢ (𝜒 → 𝜃) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 3imtr4.2 | . . 3 ⊢ (𝜒 ↔ 𝜑) | |
2 | 3imtr4.1 | . . 3 ⊢ (𝜑 → 𝜓) | |
3 | 1, 2 | sylbi 120 | . 2 ⊢ (𝜒 → 𝜓) |
4 | 3imtr4.3 | . 2 ⊢ (𝜃 ↔ 𝜓) | |
5 | 3, 4 | sylibr 133 | 1 ⊢ (𝜒 → 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: dcn 828 stdcn 833 dcan 919 xordc1 1372 hbxfrbi 1449 nfalt 1558 19.29r 1601 19.31r 1660 sbimi 1738 spsbbi 1817 sbi2v 1865 euan 2056 2exeu 2092 ralimi2 2495 reximi2 2531 r19.28av 2571 r19.29r 2573 elex 2700 rmoan 2888 rmoimi2 2891 sseq2 3126 rabss2 3185 unssdif 3316 inssdif 3317 unssin 3320 inssun 3321 rabn0r 3394 undif4 3430 ssdif0im 3432 inssdif0im 3435 ssundifim 3451 ralf0 3471 prmg 3652 difprsnss 3666 snsspw 3699 pwprss 3740 pwtpss 3741 uniin 3764 intss 3800 iuniin 3831 iuneq1 3834 iuneq2 3837 iundif2ss 3886 iinuniss 3903 iunpwss 3912 intexrabim 4086 exmidundif 4137 exmidundifim 4138 exss 4157 pwunss 4213 soeq2 4246 ordunisuc2r 4438 peano5 4520 reliin 4669 coeq1 4704 coeq2 4705 cnveq 4721 dmeq 4747 dmin 4755 dmcoss 4816 rncoeq 4820 resiexg 4872 dminss 4961 imainss 4962 dfco2a 5047 euiotaex 5112 fununi 5199 fof 5353 f1ocnv 5388 rexrnmpt 5571 isocnv 5720 isotr 5725 oprabid 5811 dmtpos 6161 tposfn 6178 smores 6197 eqer 6469 ixpeq2 6614 enssdom 6664 fiprc 6717 fiintim 6825 ltexprlemlol 7434 ltexprlemupu 7436 recexgt0 8366 peano2uz2 9182 eluzp1p1 9375 peano2uz 9405 zq 9445 ubmelfzo 10008 frecuzrdgtcl 10216 frecuzrdgfunlem 10223 expclzaplem 10348 hashfiv01gt1 10560 fsum2dlemstep 11235 sin02gt0 11506 qredeu 11814 bj-stim 13125 bj-stan 13126 bj-stal 13128 bj-nfalt 13142 bj-indint 13300 |
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