| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 6027 cbvmpov 6101 ovmpog 6156 fvmpopr2d 6158 eqopi 6335 fmpoco 6381 nnaordex 6696 map0g 6857 xpcomco 7010 xpmapenlem 7035 phplem3 7040 phplem4 7041 sbthlemi5 7160 addcmpblnq 7587 ltrnqg 7640 enq0ref 7653 addcmpblnq0 7663 distrlem4prl 7804 distrlem4pru 7805 recexgt0sr 7993 axcnre 8101 cnegexlem2 8355 cnegexlem3 8356 recexap 8833 xaddpnf2 10082 xaddmnf2 10084 rexadd 10087 xaddnemnf 10092 xaddnepnf 10093 xposdif 10117 frec2uzrand 10668 seqeq3 10715 seqf1oglem2 10783 seqf1og 10784 lsw1 11167 swrdccat 11320 ccats1pfxeqbi 11327 shftcan1 11412 remul2 11451 immul2 11458 fprodssdc 12169 ef0lem 12239 efieq1re 12351 dvdsnegb 12387 dvdscmul 12397 dvds2ln 12403 dvds2add 12404 dvds2sub 12405 gcdn0val 12550 rpmulgcd 12615 lcmval 12653 lcmn0val 12656 odzval 12832 pcmpt 12934 grpsubval 13647 mulgnn0gsum 13733 crngpropd 14071 opprringbg 14112 dvdsrtr 14134 isopn3 14868 dvexp 15454 dvexp2 15455 elply2 15478 lgsval3 15766 lgsdinn0 15796 incistruhgr 15960 clwwlkn1loopb 16290 clwwlkext2edg 16292 clwwlknonex2 16309 eupth2lem3lem3fi 16340 subctctexmid 16652 |
| Copyright terms: Public domain | W3C validator |