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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 711 elab3gf 2956 elpwi 3661 elsni 3687 elpr2 3691 elpri 3692 eltpi 3716 snssi 3817 prssi 3831 eloni 4472 limuni2 4494 elxpi 4741 releldmb 4969 relelrnb 4970 elrnmpt2d 4987 elrelimasn 5102 funeu 5351 fneu 5436 fvelima 5697 eloprabi 6361 fo2ndf 6392 elmpom 6403 tfrlem9 6485 ecexr 6707 elqsi 6756 qsel 6781 ecopovsym 6800 ecopovsymg 6803 elpmi 6836 elmapi 6839 pmsspw 6852 brdomi 6920 en1uniel 6978 mapdom1g 7033 dif1en 7068 enomnilem 7337 omnimkv 7355 mkvprop 7357 fodjumkvlemres 7358 enmkvlem 7360 enwomnilem 7368 ltrnqi 7641 peano2nnnn 8073 peano2nn 9155 eliooord 10163 fzrev3i 10323 elfzole1 10391 elfzolt2 10392 bcp1nk 11025 rere 11443 climcl 11860 climcau 11925 fprodcnv 12204 isstruct2im 13110 restsspw 13350 mgmcl 13460 submss 13577 subm0cl 13579 submcl 13580 submmnd 13581 subgsubm 13801 opprnzr 14219 opprdomn 14308 zrhval 14650 istopfin 14743 uniopn 14744 iunopn 14745 inopn 14746 eltpsg 14783 basis1 14790 basis2 14791 eltg4i 14798 lmff 14992 psmetf 15068 psmet0 15070 psmettri2 15071 metflem 15092 xmetf 15093 xmeteq0 15102 xmettri2 15104 cncff 15320 cncfi 15321 limcresi 15409 dvcnp2cntop 15442 sinq34lt0t 15574 lgsdir2lem2 15777 2sqlem9 15872 edgval 15930 uhgrfm 15943 ushgrfm 15944 upgrfen 15967 umgrfen 15977 uspgrfen 16029 usgrfen 16030 wlkcprim 16220 trlsv 16254 isclwwlkni 16277 eupthv 16316 |
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