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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 2249 | . 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 2213 |
| This theorem depends on definitions: df-bi 117 df-cleq 2224 |
| This theorem is referenced by: sylan9req 2285 sylan9eqr 2286 difeq12 3322 uneq12 3358 ineq12 3405 ifeq12 3626 preq12 3754 prprc 3786 preq12b 3858 opeq12 3869 xpeq12 4750 nfimad 5091 coi2 5260 funimass1 5414 f1orescnv 5608 resdif 5614 oveq12 6037 cbvmpov 6111 ovmpog 6166 fvmpopr2d 6168 eqopi 6344 fmpoco 6390 supp0cosupp0fn 6445 imacosuppfn 6446 nnaordex 6739 map0g 6900 xpcomco 7053 xpmapenlem 7078 phplem3 7083 phplem4 7084 sbthlemi5 7203 addcmpblnq 7630 ltrnqg 7683 enq0ref 7696 addcmpblnq0 7706 distrlem4prl 7847 distrlem4pru 7848 recexgt0sr 8036 axcnre 8144 cnegexlem2 8397 cnegexlem3 8398 recexap 8875 xaddpnf2 10126 xaddmnf2 10128 rexadd 10131 xaddnemnf 10136 xaddnepnf 10137 xposdif 10161 frec2uzrand 10713 seqeq3 10760 seqf1oglem2 10828 seqf1og 10829 lsw1 11212 swrdccat 11365 ccats1pfxeqbi 11372 shftcan1 11457 remul2 11496 immul2 11503 fprodssdc 12214 ef0lem 12284 efieq1re 12396 dvdsnegb 12432 dvdscmul 12442 dvds2ln 12448 dvds2add 12449 dvds2sub 12450 gcdn0val 12595 rpmulgcd 12660 lcmval 12698 lcmn0val 12701 odzval 12877 pcmpt 12979 grpsubval 13692 mulgnn0gsum 13778 crngpropd 14116 opprringbg 14157 dvdsrtr 14179 isopn3 14919 dvexp 15505 dvexp2 15506 elply2 15529 lgsval3 15820 lgsdinn0 15850 incistruhgr 16014 clwwlkn1loopb 16344 clwwlkext2edg 16346 clwwlknonex2 16363 eupth2lem3lem3fi 16394 subctctexmid 16705 |
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