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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 2256 | . 2 ⊢ ((𝐴 = 𝐵 ∧ 𝐵 = 𝐶) → 𝐴 = 𝐶) | |
| 4 | 1, 2, 3 | syl2an 289 | 1 ⊢ ((𝜑 ∧ 𝜓) → 𝐴 = 𝐶) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 104 = wceq 1402 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1500 ax-gen 1502 ax-4 1563 ax-17 1579 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-cleq 2231 |
| This theorem is used by: sylan9req 2292 sylan9eqr 2293 difeq12 3342 uneq12 3378 ineq12 3427 ifeq12 3657 preq12 3790 prprc 3823 preq12b 3895 opeq12 3906 xpeq12 4793 nfimad 5135 coi2 5304 funimass1 5458 f1orescnv 5655 resdif 5661 oveq12 6094 cbvmpov 6168 ovmpog 6223 fvmpopr2d 6225 eqopi 6406 fmpoco 6452 supp0cosupp0fn 6507 imacosuppfn 6508 nnaordex 6801 map0g 6969 xpcomco 7124 xpmapenlem 7149 phplem3 7155 phplem4 7156 sbthlemi5 7278 addcmpblnq 7734 ltrnqg 7787 enq0ref 7800 addcmpblnq0 7810 distrlem4prl 7951 distrlem4pru 7952 recexgt0sr 8140 axcnre 8248 cnegexlem2 8502 cnegexlem3 8503 recexap 8981 xaddpnf2 10249 xaddmnf2 10251 rexadd 10254 xaddnemnf 10259 xaddnepnf 10260 xposdif 10284 frec2uzrand 10842 seqeq3 10889 seqf1oglem2 10957 seqf1og 10958 lsw1 11354 swrdccat 11507 ccats1pfxeqbi 11514 shftcan1 11599 remul2 11638 immul2 11645 fprodssdc 12357 ef0lem 12427 efieq1re 12539 dvdsnegb 12575 dvdscmul 12585 dvds2ln 12591 dvds2add 12592 dvds2sub 12593 gcdn0val 12738 rpmulgcd 12803 lcmval 12841 lcmn0val 12844 odzval 13020 pcmpt 13122 ballotfilemfp1 13231 grpsubval 13851 mulgnn0gzsum 13931 crngpropd 14344 opprringbg 14385 dvdsrtr 14408 isopn3 15226 dvexp 15812 dvexp2 15813 elply2 15836 lgsval3 16137 lgsdinn0 16167 incistruhgr 16331 clwwlkn1loopb 16661 clwwlkext2edg 16663 clwwlknonex2 16680 eupth2lem3lem3fi 16711 subctctexmid 17030 |
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