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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 2252 | . 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 2216 |
| This theorem depends on definitions: df-bi 117 df-cleq 2227 |
| This theorem is referenced by: sylan9req 2288 sylan9eqr 2289 difeq12 3336 uneq12 3372 ineq12 3421 ifeq12 3643 preq12 3775 prprc 3807 preq12b 3879 opeq12 3890 xpeq12 4773 nfimad 5115 coi2 5284 funimass1 5438 f1orescnv 5635 resdif 5641 oveq12 6067 cbvmpov 6141 ovmpog 6196 fvmpopr2d 6198 eqopi 6379 fmpoco 6425 supp0cosupp0fn 6480 imacosuppfn 6481 nnaordex 6774 map0g 6935 xpcomco 7090 xpmapenlem 7115 phplem3 7121 phplem4 7122 sbthlemi5 7244 addcmpblnq 7698 ltrnqg 7751 enq0ref 7764 addcmpblnq0 7774 distrlem4prl 7915 distrlem4pru 7916 recexgt0sr 8104 axcnre 8212 cnegexlem2 8465 cnegexlem3 8466 recexap 8944 xaddpnf2 10199 xaddmnf2 10201 rexadd 10204 xaddnemnf 10209 xaddnepnf 10210 xposdif 10234 frec2uzrand 10791 seqeq3 10838 seqf1oglem2 10906 seqf1og 10907 lsw1 11299 swrdccat 11452 ccats1pfxeqbi 11459 shftcan1 11544 remul2 11583 immul2 11590 fprodssdc 12301 ef0lem 12371 efieq1re 12483 dvdsnegb 12519 dvdscmul 12529 dvds2ln 12535 dvds2add 12536 dvds2sub 12537 gcdn0val 12682 rpmulgcd 12747 lcmval 12785 lcmn0val 12788 odzval 12964 pcmpt 13066 ballotfilemfp1 13175 grpsubval 13801 mulgnn0gsum 13881 crngpropd 14282 opprringbg 14323 dvdsrtr 14346 isopn3 15116 dvexp 15702 dvexp2 15703 elply2 15726 lgsval3 16017 lgsdinn0 16047 incistruhgr 16211 clwwlkn1loopb 16541 clwwlkext2edg 16543 clwwlknonex2 16560 eupth2lem3lem3fi 16591 subctctexmid 16900 |
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