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| Mirrors > Home > ILE Home > Th. List > sylan9eq | GIF version | ||
| Description: An equality transitivity deduction. (Contributed by NM, 8-May-1994.) (Proof shortened by Andrew Salmon, 25-May-2011.) |
| Ref | Expression |
|---|---|
| sylan9eq.1 | ⊢ (𝜑 → 𝐴 = 𝐵) |
| sylan9eq.2 | ⊢ (𝜓 → 𝐵 = 𝐶) |
| Ref | Expression |
|---|---|
| sylan9eq | ⊢ ((𝜑 ∧ 𝜓) → 𝐴 = 𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sylan9eq.1 | . 2 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 2 | sylan9eq.2 | . 2 ⊢ (𝜓 → 𝐵 = 𝐶) | |
| 3 | eqtr 2256 | . 2 ⊢ ((𝐴 = 𝐵 ∧ 𝐵 = 𝐶) → 𝐴 = 𝐶) | |
| 4 | 1, 2, 3 | syl2an 289 | 1 ⊢ ((𝜑 ∧ 𝜓) → 𝐴 = 𝐶) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 104 = wceq 1402 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1500 ax-gen 1502 ax-4 1563 ax-17 1579 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-cleq 2231 |
| This theorem is used by: sylan9req 2292 sylan9eqr 2293 difeq12 3342 uneq12 3378 ineq12 3427 ifeq12 3657 preq12 3790 prprc 3823 preq12b 3895 opeq12 3906 xpeq12 4793 nfimad 5135 coi2 5304 funimass1 5458 f1orescnv 5655 resdif 5661 oveq12 6094 cbvmpov 6168 ovmpog 6223 fvmpopr2d 6225 eqopi 6406 fmpoco 6452 supp0cosupp0fn 6507 imacosuppfn 6508 nnaordex 6801 map0g 6969 xpcomco 7124 xpmapenlem 7149 phplem3 7155 phplem4 7156 sbthlemi5 7278 addcmpblnq 7734 ltrnqg 7787 enq0ref 7800 addcmpblnq0 7810 distrlem4prl 7951 distrlem4pru 7952 recexgt0sr 8140 axcnre 8248 cnegexlem2 8503 cnegexlem3 8504 recexap 8983 xaddpnf2 10259 xaddmnf2 10261 rexadd 10264 xaddnemnf 10269 xaddnepnf 10270 xposdif 10294 frec2uzrand 10855 seqeq3 10902 seqf1oglem2 10970 seqf1og 10971 lsw1 11368 swrdccat 11521 ccats1pfxeqbi 11528 shftcan1 11613 remul2 11652 immul2 11659 fprodssdc 12373 ef0lem 12443 efieq1re 12555 dvdsnegb 12591 dvdscmul 12601 dvds2ln 12607 dvds2add 12608 dvds2sub 12609 gcdn0val 12754 rpmulgcd 12819 lcmval 12857 lcmn0val 12860 odzval 13040 pcmpt 13142 ballotfilemfp1 13280 grpsubval 13900 mulgnn0gzsum 13980 crngpropd 14393 opprringbg 14434 dvdsrtr 14457 isopn3 15275 dvexp 15861 dvexp2 15862 elply2 15885 bposlem5 16213 lgsval3 16235 lgsdinn0 16265 incistruhgr 16429 clwwlkn1loopb 16759 clwwlkext2edg 16761 clwwlknonex2 16778 eupth2lem3lem3fi 16809 subctctexmid 17128 |
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