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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 2250 | . 2 ⊢ ((𝐴 = 𝐵 ∧ 𝐵 = 𝐶) → 𝐴 = 𝐶) | |
| 4 | 1, 2, 3 | syl2an 289 | 1 ⊢ ((𝜑 ∧ 𝜓) → 𝐴 = 𝐶) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 = wceq 1398 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1496 ax-gen 1498 ax-4 1559 ax-17 1575 ax-ext 2214 |
| This theorem depends on definitions: df-bi 117 df-cleq 2225 |
| This theorem is referenced by: sylan9req 2286 sylan9eqr 2287 difeq12 3332 uneq12 3368 ineq12 3417 ifeq12 3639 preq12 3770 prprc 3802 preq12b 3874 opeq12 3885 xpeq12 4768 nfimad 5110 coi2 5279 funimass1 5433 f1orescnv 5630 resdif 5636 oveq12 6059 cbvmpov 6133 ovmpog 6188 fvmpopr2d 6190 eqopi 6366 fmpoco 6412 supp0cosupp0fn 6467 imacosuppfn 6468 nnaordex 6761 map0g 6922 xpcomco 7077 xpmapenlem 7102 phplem3 7108 phplem4 7109 sbthlemi5 7231 addcmpblnq 7682 ltrnqg 7735 enq0ref 7748 addcmpblnq0 7758 distrlem4prl 7899 distrlem4pru 7900 recexgt0sr 8088 axcnre 8196 cnegexlem2 8449 cnegexlem3 8450 recexap 8927 xaddpnf2 10180 xaddmnf2 10182 rexadd 10185 xaddnemnf 10190 xaddnepnf 10191 xposdif 10215 frec2uzrand 10767 seqeq3 10814 seqf1oglem2 10882 seqf1og 10883 lsw1 11274 swrdccat 11427 ccats1pfxeqbi 11434 shftcan1 11519 remul2 11558 immul2 11565 fprodssdc 12276 ef0lem 12346 efieq1re 12458 dvdsnegb 12494 dvdscmul 12504 dvds2ln 12510 dvds2add 12511 dvds2sub 12512 gcdn0val 12657 rpmulgcd 12722 lcmval 12760 lcmn0val 12763 odzval 12939 pcmpt 13041 grpsubval 13759 mulgnn0gsum 13845 crngpropd 14183 opprringbg 14224 dvdsrtr 14246 isopn3 14990 dvexp 15576 dvexp2 15577 elply2 15600 lgsval3 15891 lgsdinn0 15921 incistruhgr 16085 clwwlkn1loopb 16415 clwwlkext2edg 16417 clwwlknonex2 16434 eupth2lem3lem3fi 16465 subctctexmid 16774 |
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