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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 1485 sbrim 2009 sbal1yz 2054 sbmo 2139 mo4f 2140 moanim 2154 necon4addc 2472 necon1bddc 2479 nfraldya 2567 r3al 2576 r19.23t 2640 ceqsralt 2830 ralab 2966 ralrab 2967 euind 2993 reu2 2994 rmo4 2999 rmo3f 3003 rmo4f 3004 reuind 3011 rmo3 3124 dfdif3 3317 raldifb 3347 unss 3381 ralunb 3388 inssdif0im 3562 ssundifim 3578 raaan 3600 pwss 3668 ralsnsg 3706 ralsns 3707 disjsn 3731 snssOLD 3799 snssb 3806 unissb 3923 intun 3959 intpr 3960 dfiin2g 4003 dftr2 4189 repizf2lem 4251 axpweq 4261 zfpow 4265 axpow2 4266 zfun 4531 uniex2 4533 setindel 4636 setind 4637 elirr 4639 en2lp 4652 zfregfr 4672 tfi 4680 raliunxp 4871 dffun2 5336 dffun4 5337 dffun4f 5342 dffun7 5353 funcnveq 5393 fununi 5398 pw1dc0el 7103 fiintim 7123 addnq0mo 7667 mulnq0mo 7668 addsrmo 7963 mulsrmo 7964 prime 9579 raluz2 9813 ralrp 9910 modfsummod 12037 nnwosdc 12628 isprm4 12709 dedekindicclemicc 15375 bdcriota 16529 bj-uniex2 16562 bj-ssom 16582 |
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