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| Mirrors > Home > ILE Home > Th. List > ibi | GIF version | ||
| Description: Inference that converts a biconditional implied by one of its arguments, into an implication. (Contributed by NM, 17-Oct-2003.) |
| Ref | Expression |
|---|---|
| ibi.1 | ⊢ (𝜑 → (𝜑 ↔ 𝜓)) |
| Ref | Expression |
|---|---|
| ibi | ⊢ (𝜑 → 𝜓) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ibi.1 | . . 3 ⊢ (𝜑 → (𝜑 ↔ 𝜓)) | |
| 2 | 1 | biimpd 144 | . 2 ⊢ (𝜑 → (𝜑 → 𝜓)) |
| 3 | 2 | pm2.43i 49 | 1 ⊢ (𝜑 → 𝜓) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ↔ wb 105 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 |
| This theorem depends on definitions: df-bi 117 |
| This theorem is referenced by: ibir 177 pm5.21nii 712 elab3gf 2967 elpwi 3678 elsni 3707 elpr2 3711 elpri 3712 eltpi 3736 snssi 3838 prssi 3852 eloni 4496 limuni2 4518 elxpi 4765 releldmb 4994 relelrnb 4995 elrnmpt2d 5012 elrelimasn 5128 funeu 5377 fneu 5462 fvelima 5728 eloprabi 6392 fo2ndf 6423 elmpom 6434 fczsupp0 6459 tfrlem9 6550 ecexr 6772 elqsi 6821 qsel 6846 ecopovsym 6865 ecopovsymg 6868 elpmi 6901 elmapi 6904 pmsspw 6917 brdomi 6986 en1uniel 7044 mapdom1g 7100 dif1en 7136 enomnilem 7429 omnimkv 7447 mkvprop 7449 fodjumkvlemres 7450 enmkvlem 7452 enwomnilem 7460 ltrnqi 7736 peano2nnnn 8168 peano2nn 9249 eliooord 10261 fzrev3i 10422 elfzole1 10490 elfzolt2 10491 bcp1nk 11124 rere 11550 climcl 11967 climcau 12032 fprodcnv 12311 isstruct2im 13222 restsspw 13462 mgmcl 13572 submss 13689 subm0cl 13691 submcl 13692 submmnd 13693 subgsubm 13913 opprnzr 14331 opprdomn 14421 zrhval 14765 istopfin 14865 uniopn 14866 iunopn 14867 inopn 14868 eltpsg 14905 basis1 14912 basis2 14913 eltg4i 14920 lmff 15114 psmetf 15190 psmet0 15192 psmettri2 15193 metflem 15214 xmetf 15215 xmeteq0 15224 xmettri2 15226 cncff 15442 cncfi 15443 limcresi 15531 dvcnp2cntop 15564 sinq34lt0t 15696 lgsdir2lem2 15902 2sqlem9 15997 edgval 16055 uhgrfm 16068 ushgrfm 16069 upgrfen 16092 umgrfen 16102 uspgrfen 16154 usgrfen 16155 wlkcprim 16345 trlsv 16379 isclwwlkni 16402 eupthv 16441 |
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