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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 3250 uneq12 3286 ineq12 3333 ifeq12 3552 preq12 3673 prprc 3704 preq12b 3772 opeq12 3782 xpeq12 4647 nfimad 4981 coi2 5147 funimass1 5295 f1orescnv 5479 resdif 5485 oveq12 5887 cbvmpov 5958 ovmpog 6012 eqopi 6176 fmpoco 6220 nnaordex 6532 map0g 6691 xpcomco 6829 xpmapenlem 6852 phplem3 6857 phplem4 6858 sbthlemi5 6963 addcmpblnq 7369 ltrnqg 7422 enq0ref 7435 addcmpblnq0 7445 distrlem4prl 7586 distrlem4pru 7587 recexgt0sr 7775 axcnre 7883 cnegexlem2 8136 cnegexlem3 8137 recexap 8613 xaddpnf2 9850 xaddmnf2 9852 rexadd 9855 xaddnemnf 9860 xaddnepnf 9861 xposdif 9885 frec2uzrand 10408 seqeq3 10453 shftcan1 10846 remul2 10885 immul2 10892 fprodssdc 11601 ef0lem 11671 efieq1re 11782 dvdsnegb 11818 dvdscmul 11828 dvds2ln 11834 dvds2add 11835 dvds2sub 11836 gcdn0val 11965 rpmulgcd 12030 lcmval 12066 lcmn0val 12069 odzval 12244 pcmpt 12344 grpsubval 12925 crngpropd 13224 opprringbg 13256 dvdsrtr 13276 isopn3 13765 dvexp 14315 dvexp2 14316 lgsval3 14559 lgsdinn0 14589 subctctexmid 14890 |
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