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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 6360 fo2ndf 6391 elmpom 6402 tfrlem9 6484 ecexr 6706 elqsi 6755 qsel 6780 ecopovsym 6799 ecopovsymg 6802 elpmi 6835 elmapi 6838 pmsspw 6851 brdomi 6919 en1uniel 6977 mapdom1g 7032 dif1en 7067 enomnilem 7336 omnimkv 7354 mkvprop 7356 fodjumkvlemres 7357 enmkvlem 7359 enwomnilem 7367 ltrnqi 7640 peano2nnnn 8072 peano2nn 9154 eliooord 10162 fzrev3i 10322 elfzole1 10390 elfzolt2 10391 bcp1nk 11023 rere 11425 climcl 11842 climcau 11907 fprodcnv 12185 isstruct2im 13091 restsspw 13331 mgmcl 13441 submss 13558 subm0cl 13560 submcl 13561 submmnd 13562 subgsubm 13782 opprnzr 14199 opprdomn 14288 zrhval 14630 istopfin 14723 uniopn 14724 iunopn 14725 inopn 14726 eltpsg 14763 basis1 14770 basis2 14771 eltg4i 14778 lmff 14972 psmetf 15048 psmet0 15050 psmettri2 15051 metflem 15072 xmetf 15073 xmeteq0 15082 xmettri2 15084 cncff 15300 cncfi 15301 limcresi 15389 dvcnp2cntop 15422 sinq34lt0t 15554 lgsdir2lem2 15757 2sqlem9 15852 edgval 15910 uhgrfm 15923 ushgrfm 15924 upgrfen 15947 umgrfen 15957 uspgrfen 16009 usgrfen 16010 wlkcprim 16200 trlsv 16234 isclwwlkni 16257 eupthv 16296 |
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