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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 2195 | . 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 1353 |
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 1447 ax-gen 1449 ax-4 1510 ax-17 1526 ax-ext 2159 |
This theorem depends on definitions: df-bi 117 df-cleq 2170 |
This theorem is referenced by: sylan9req 2231 sylan9eqr 2232 difeq12 3248 uneq12 3284 ineq12 3331 ifeq12 3550 preq12 3671 prprc 3702 preq12b 3770 opeq12 3780 xpeq12 4645 nfimad 4979 coi2 5145 funimass1 5293 f1orescnv 5477 resdif 5483 oveq12 5883 cbvmpov 5954 ovmpog 6008 eqopi 6172 fmpoco 6216 nnaordex 6528 map0g 6687 xpcomco 6825 xpmapenlem 6848 phplem3 6853 phplem4 6854 sbthlemi5 6959 addcmpblnq 7365 ltrnqg 7418 enq0ref 7431 addcmpblnq0 7441 distrlem4prl 7582 distrlem4pru 7583 recexgt0sr 7771 axcnre 7879 cnegexlem2 8132 cnegexlem3 8133 recexap 8609 xaddpnf2 9846 xaddmnf2 9848 rexadd 9851 xaddnemnf 9856 xaddnepnf 9857 xposdif 9881 frec2uzrand 10404 seqeq3 10449 shftcan1 10842 remul2 10881 immul2 10888 fprodssdc 11597 ef0lem 11667 efieq1re 11778 dvdsnegb 11814 dvdscmul 11824 dvds2ln 11830 dvds2add 11831 dvds2sub 11832 gcdn0val 11961 rpmulgcd 12026 lcmval 12062 lcmn0val 12065 odzval 12240 pcmpt 12340 grpsubval 12918 crngpropd 13216 opprringbg 13248 dvdsrtr 13268 isopn3 13595 dvexp 14145 dvexp2 14146 lgsval3 14389 lgsdinn0 14419 subctctexmid 14720 |
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