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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 4231 repizf2lem 4298 axpweq 4308 zfpow 4312 axpow2 4313 zfun 4579 uniex2OLD 4582 setindel 4685 setind 4686 elirr 4688 en2lp 4701 zfregfr 4721 tfi 4729 raliunxp 4921 dffun2 5387 dffun4 5388 dffun4f 5393 dffun7 5404 funcnveq 5444 fununi 5449 pw1dc0el 7218 fiintim 7238 addnq0mo 7814 mulnq0mo 7815 addsrmo 8110 mulsrmo 8111 prime 9745 raluz2 9979 ralrp 10076 modfsummod 12225 nnwosdc 12816 isprm4 12897 dedekindicclemicc 15733 bdcriota 16909 bj-ssom 16962 exmidpeirce 17038 |
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