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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 3317 uneq12 3353 ineq12 3400 ifeq12 3619 preq12 3745 prprc 3777 preq12b 3848 opeq12 3859 xpeq12 4738 nfimad 5077 coi2 5245 funimass1 5398 f1orescnv 5590 resdif 5596 oveq12 6016 cbvmpov 6090 ovmpog 6145 fvmpopr2d 6147 eqopi 6324 fmpoco 6368 nnaordex 6682 map0g 6843 xpcomco 6993 xpmapenlem 7018 phplem3 7023 phplem4 7024 sbthlemi5 7139 addcmpblnq 7565 ltrnqg 7618 enq0ref 7631 addcmpblnq0 7641 distrlem4prl 7782 distrlem4pru 7783 recexgt0sr 7971 axcnre 8079 cnegexlem2 8333 cnegexlem3 8334 recexap 8811 xaddpnf2 10055 xaddmnf2 10057 rexadd 10060 xaddnemnf 10065 xaddnepnf 10066 xposdif 10090 frec2uzrand 10639 seqeq3 10686 seqf1oglem2 10754 seqf1og 10755 lsw1 11134 swrdccat 11282 ccats1pfxeqbi 11289 shftcan1 11360 remul2 11399 immul2 11406 fprodssdc 12116 ef0lem 12186 efieq1re 12298 dvdsnegb 12334 dvdscmul 12344 dvds2ln 12350 dvds2add 12351 dvds2sub 12352 gcdn0val 12497 rpmulgcd 12562 lcmval 12600 lcmn0val 12603 odzval 12779 pcmpt 12881 grpsubval 13594 mulgnn0gsum 13680 crngpropd 14017 opprringbg 14058 dvdsrtr 14080 isopn3 14814 dvexp 15400 dvexp2 15401 elply2 15424 lgsval3 15712 lgsdinn0 15742 incistruhgr 15905 subctctexmid 16425 |
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