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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 2957 elpwi 3665 elsni 3691 elpr2 3695 elpri 3696 eltpi 3720 snssi 3822 prssi 3836 eloni 4478 limuni2 4500 elxpi 4747 releldmb 4975 relelrnb 4976 elrnmpt2d 4993 elrelimasn 5109 funeu 5358 fneu 5443 fvelima 5706 eloprabi 6370 fo2ndf 6401 elmpom 6412 fczsupp0 6437 tfrlem9 6528 ecexr 6750 elqsi 6799 qsel 6824 ecopovsym 6843 ecopovsymg 6846 elpmi 6879 elmapi 6882 pmsspw 6895 brdomi 6963 en1uniel 7021 mapdom1g 7076 dif1en 7111 enomnilem 7380 omnimkv 7398 mkvprop 7400 fodjumkvlemres 7401 enmkvlem 7403 enwomnilem 7411 ltrnqi 7684 peano2nnnn 8116 peano2nn 9197 eliooord 10207 fzrev3i 10368 elfzole1 10436 elfzolt2 10437 bcp1nk 11070 rere 11488 climcl 11905 climcau 11970 fprodcnv 12249 isstruct2im 13155 restsspw 13395 mgmcl 13505 submss 13622 subm0cl 13624 submcl 13625 submmnd 13626 subgsubm 13846 opprnzr 14264 opprdomn 14354 zrhval 14696 istopfin 14794 uniopn 14795 iunopn 14796 inopn 14797 eltpsg 14834 basis1 14841 basis2 14842 eltg4i 14849 lmff 15043 psmetf 15119 psmet0 15121 psmettri2 15122 metflem 15143 xmetf 15144 xmeteq0 15153 xmettri2 15155 cncff 15371 cncfi 15372 limcresi 15460 dvcnp2cntop 15493 sinq34lt0t 15625 lgsdir2lem2 15831 2sqlem9 15926 edgval 15984 uhgrfm 15997 ushgrfm 15998 upgrfen 16021 umgrfen 16031 uspgrfen 16083 usgrfen 16084 wlkcprim 16274 trlsv 16308 isclwwlkni 16331 eupthv 16370 |
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