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| Mirrors > Home > ILE Home > Th. List > imbi1i | GIF version | ||
| Description: Introduce a consequent to both sides of a logical equivalence. (Contributed by NM, 5-Aug-1993.) (Proof shortened by Wolf Lammen, 17-Sep-2013.) |
| Ref | Expression |
|---|---|
| imbi1i.1 | ⊢ (𝜑 ↔ 𝜓) |
| Ref | Expression |
|---|---|
| imbi1i | ⊢ ((𝜑 → 𝜒) ↔ (𝜓 → 𝜒)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | imbi1i.1 | . 2 ⊢ (𝜑 ↔ 𝜓) | |
| 2 | imbi1 236 | . 2 ⊢ ((𝜑 ↔ 𝜓) → ((𝜑 → 𝜒) ↔ (𝜓 → 𝜒))) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ ((𝜑 → 𝜒) ↔ (𝜓 → 𝜒)) |
| 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 ax-ia2 107 ax-ia3 108 |
| This theorem depends on definitions: df-bi 117 |
| This theorem is referenced by: imbi12i 239 ancomsimp 1486 sbrim 2010 sbal1yz 2055 sbmo 2140 mo4f 2141 moanim 2155 necon4addc 2482 necon1bddc 2489 nfraldya 2577 r3al 2586 r19.23t 2650 ceqsralt 2841 ralab 2977 ralrab 2978 euind 3004 reu2 3005 rmo4 3010 rmo3f 3014 rmo4f 3015 reuind 3022 rmo3 3135 dfdif3 3329 raldifb 3359 unss 3393 ralunb 3400 inssdif0im 3576 ssundifim 3593 raaan 3615 pwss 3688 ralsnsg 3726 ralsns 3727 disjsn 3751 snssOLD 3819 snssb 3827 unissb 3944 intun 3980 intpr 3981 dfiin2g 4024 dftr2 4210 repizf2lem 4274 axpweq 4284 zfpow 4288 axpow2 4289 zfun 4555 uniex2 4557 setindel 4660 setind 4661 elirr 4663 en2lp 4676 zfregfr 4696 tfi 4704 raliunxp 4896 dffun2 5362 dffun4 5363 dffun4f 5368 dffun7 5379 funcnveq 5419 fununi 5424 pw1dc0el 7171 fiintim 7191 addnq0mo 7762 mulnq0mo 7763 addsrmo 8058 mulsrmo 8059 prime 9677 raluz2 9911 ralrp 10008 modfsummod 12144 nnwosdc 12735 isprm4 12816 dedekindicclemicc 15497 bdcriota 16653 bj-uniex2 16686 bj-ssom 16706 exmidpeirce 16781 |
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