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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 709 elab3gf 2953 elpwi 3658 elsni 3684 elpr2 3688 elpri 3689 eltpi 3713 snssi 3812 prssi 3826 eloni 4466 limuni2 4488 elxpi 4735 releldmb 4961 relelrnb 4962 elrnmpt2d 4979 elrelimasn 5094 funeu 5343 fneu 5427 fvelima 5687 eloprabi 6348 fo2ndf 6379 tfrlem9 6471 ecexr 6693 elqsi 6742 qsel 6767 ecopovsym 6786 ecopovsymg 6789 elpmi 6822 elmapi 6825 pmsspw 6838 brdomi 6906 en1uniel 6964 mapdom1g 7016 dif1en 7049 enomnilem 7316 omnimkv 7334 mkvprop 7336 fodjumkvlemres 7337 enmkvlem 7339 enwomnilem 7347 ltrnqi 7619 peano2nnnn 8051 peano2nn 9133 eliooord 10136 fzrev3i 10296 elfzole1 10364 elfzolt2 10365 bcp1nk 10996 rere 11391 climcl 11808 climcau 11873 fprodcnv 12151 isstruct2im 13057 restsspw 13297 mgmcl 13407 submss 13524 subm0cl 13526 submcl 13527 submmnd 13528 subgsubm 13748 opprnzr 14165 opprdomn 14254 zrhval 14596 istopfin 14689 uniopn 14690 iunopn 14691 inopn 14692 eltpsg 14729 basis1 14736 basis2 14737 eltg4i 14744 lmff 14938 psmetf 15014 psmet0 15016 psmettri2 15017 metflem 15038 xmetf 15039 xmeteq0 15048 xmettri2 15050 cncff 15266 cncfi 15267 limcresi 15355 dvcnp2cntop 15388 sinq34lt0t 15520 lgsdir2lem2 15723 2sqlem9 15818 uhgrfm 15888 ushgrfm 15889 upgrfen 15912 umgrfen 15922 uspgrfen 15972 usgrfen 15973 wlkcprim 16091 trlsv 16123 |
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