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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 |
| This proof depends on syntax axioms: → wi 4 ↔ wb 105 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 |
| This proof depends on definitions: df-bi 117 |
| This theorem is used by: imbi12i 239 ancomsimp 1490 sbrim 2016 sbal1yz 2061 sbmo 2146 mo4f 2147 moanim 2161 necon4addc 2490 necon1bddc 2497 nfraldya 2585 r3al 2594 r19.23t 2658 ceqsralt 2849 ralab 2986 ralrab 2987 euind 3013 reu2 3014 rmo4 3019 rmo3f 3023 rmo4f 3024 reuind 3031 rmo3 3144 dfdif3 3339 raldifb 3369 unss 3403 ralunb 3410 inssdif0imOLD 3593 ssundifim 3611 raaan 3633 pwss 3708 ralsnsg 3746 ralsns 3747 disjsn 3771 snssOLD 3840 snssb 3848 unissb 3965 intun 4001 intpr 4002 dfiin2g 4045 dftr2 4233 repizf2lem 4300 axpweq 4310 zfpow 4314 axpow2 4315 zfun 4581 uniex2OLD 4584 setindel 4687 setind 4688 elirr 4690 en2lp 4703 zfregfr 4723 tfi 4731 raliunxp 4923 dffun2 5390 dffun4 5391 dffun4f 5396 dffun7 5407 funcnveq 5447 fununi 5452 pw1dc0el 7222 fiintim 7242 addnq0mo 7820 mulnq0mo 7821 addsrmo 8116 mulsrmo 8117 prime 9756 raluz2 9995 ralrp 10093 modfsummod 12250 nnwosdc 12841 isprm4 12922 dedekindicclemicc 15858 bdcriota 17114 bj-ssom 17167 exmidpeirce 17243 |
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