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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 1397 |
| 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 1495 ax-gen 1497 ax-4 1558 ax-17 1574 ax-ext 2213 |
| This theorem depends on definitions: df-bi 117 df-cleq 2224 |
| This theorem is referenced by: sylan9req 2285 sylan9eqr 2286 difeq12 3320 uneq12 3356 ineq12 3403 ifeq12 3622 preq12 3750 prprc 3782 preq12b 3853 opeq12 3864 xpeq12 4744 nfimad 5085 coi2 5253 funimass1 5407 f1orescnv 5599 resdif 5605 oveq12 6026 cbvmpov 6100 ovmpog 6155 fvmpopr2d 6157 eqopi 6334 fmpoco 6380 nnaordex 6695 map0g 6856 xpcomco 7009 xpmapenlem 7034 phplem3 7039 phplem4 7040 sbthlemi5 7159 addcmpblnq 7586 ltrnqg 7639 enq0ref 7652 addcmpblnq0 7662 distrlem4prl 7803 distrlem4pru 7804 recexgt0sr 7992 axcnre 8100 cnegexlem2 8354 cnegexlem3 8355 recexap 8832 xaddpnf2 10081 xaddmnf2 10083 rexadd 10086 xaddnemnf 10091 xaddnepnf 10092 xposdif 10116 frec2uzrand 10666 seqeq3 10713 seqf1oglem2 10781 seqf1og 10782 lsw1 11162 swrdccat 11315 ccats1pfxeqbi 11322 shftcan1 11394 remul2 11433 immul2 11440 fprodssdc 12150 ef0lem 12220 efieq1re 12332 dvdsnegb 12368 dvdscmul 12378 dvds2ln 12384 dvds2add 12385 dvds2sub 12386 gcdn0val 12531 rpmulgcd 12596 lcmval 12634 lcmn0val 12637 odzval 12813 pcmpt 12915 grpsubval 13628 mulgnn0gsum 13714 crngpropd 14051 opprringbg 14092 dvdsrtr 14114 isopn3 14848 dvexp 15434 dvexp2 15435 elply2 15458 lgsval3 15746 lgsdinn0 15776 incistruhgr 15940 clwwlkn1loopb 16270 clwwlkext2edg 16272 clwwlknonex2 16289 subctctexmid 16601 |
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