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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 716 elab3gf 2976 elpwi 3694 elsni 3723 elpr2 3727 elpri 3728 eltpi 3752 snssi 3854 prssi 3868 eloni 4515 limuni2 4537 elxpi 4785 releldmb 5014 relelrnb 5015 elrnmpt2d 5032 elrelimasn 5148 funeu 5397 fneu 5482 fvelima 5748 eloprabi 6422 fo2ndf 6453 elmpom 6464 fczsupp0 6489 tfrlem9 6580 ecexr 6802 elqsi 6851 qsel 6876 ecopovsym 6895 ecopovsymg 6898 elpmi 6931 elmapi 6934 pmsspw 6954 brdomi 7023 en1uniel 7081 mapdom1g 7137 dif1en 7173 enomnilem 7468 omnimkv 7486 mkvprop 7488 fodjumkvlemres 7489 enmkvlem 7491 enwomnilem 7499 ltrnqi 7778 peano2nnnn 8210 peano2nn 9295 eliooord 10309 fzrev3i 10473 elfzole1 10541 elfzolt2 10542 bcp1nk 11178 rere 11608 climcl 12026 climcau 12091 fprodcnv 12370 isstruct2im 13340 restsspw 13580 mgmcl 13656 submss 13760 subm0cl 13762 submcl 13763 submmnd 13764 subgsubm 13976 opprnzr 14466 opprdomn 14557 zrhval 14924 istopfin 15024 uniopn 15025 iunopn 15026 inopn 15027 eltpsg 15064 basis1 15071 basis2 15072 eltg4i 15079 lmff 15273 psmetf 15349 psmet0 15351 psmettri2 15352 metflem 15373 xmetf 15374 xmeteq0 15383 xmettri2 15385 cncff 15601 cncfi 15602 limcresi 15690 dvcnp2cntop 15723 sinq34lt0t 15855 lgsdir2lem2 16062 2sqlem9 16157 edgval 16215 uhgrfm 16228 ushgrfm 16229 upgrfen 16252 umgrfen 16262 uspgrfen 16314 usgrfen 16315 wlkcprim 16505 trlsv 16539 isclwwlkni 16562 eupthv 16601 |
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