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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 2247 | . 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 1395 |
| 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 1493 ax-gen 1495 ax-4 1556 ax-17 1572 ax-ext 2211 |
| This theorem depends on definitions: df-bi 117 df-cleq 2222 |
| This theorem is referenced by: sylan9req 2283 sylan9eqr 2284 difeq12 3318 uneq12 3354 ineq12 3401 ifeq12 3620 preq12 3748 prprc 3780 preq12b 3851 opeq12 3862 xpeq12 4742 nfimad 5083 coi2 5251 funimass1 5404 f1orescnv 5596 resdif 5602 oveq12 6022 cbvmpov 6096 ovmpog 6151 fvmpopr2d 6153 eqopi 6330 fmpoco 6376 nnaordex 6691 map0g 6852 xpcomco 7005 xpmapenlem 7030 phplem3 7035 phplem4 7036 sbthlemi5 7151 addcmpblnq 7577 ltrnqg 7630 enq0ref 7643 addcmpblnq0 7653 distrlem4prl 7794 distrlem4pru 7795 recexgt0sr 7983 axcnre 8091 cnegexlem2 8345 cnegexlem3 8346 recexap 8823 xaddpnf2 10072 xaddmnf2 10074 rexadd 10077 xaddnemnf 10082 xaddnepnf 10083 xposdif 10107 frec2uzrand 10657 seqeq3 10704 seqf1oglem2 10772 seqf1og 10773 lsw1 11153 swrdccat 11306 ccats1pfxeqbi 11313 shftcan1 11385 remul2 11424 immul2 11431 fprodssdc 12141 ef0lem 12211 efieq1re 12323 dvdsnegb 12359 dvdscmul 12369 dvds2ln 12375 dvds2add 12376 dvds2sub 12377 gcdn0val 12522 rpmulgcd 12587 lcmval 12625 lcmn0val 12628 odzval 12804 pcmpt 12906 grpsubval 13619 mulgnn0gsum 13705 crngpropd 14042 opprringbg 14083 dvdsrtr 14105 isopn3 14839 dvexp 15425 dvexp2 15426 elply2 15449 lgsval3 15737 lgsdinn0 15767 incistruhgr 15931 clwwlkn1loopb 16215 clwwlkext2edg 16217 clwwlknonex2 16234 subctctexmid 16537 |
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