| 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 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 7735 ltrnqg 7788 enq0ref 7801 addcmpblnq0 7811 distrlem4prl 7952 distrlem4pru 7953 recexgt0sr 8141 axcnre 8249 cnegexlem2 8504 cnegexlem3 8505 recexap 8984 xaddpnf2 10260 xaddmnf2 10262 rexadd 10265 xaddnemnf 10270 xaddnepnf 10271 xposdif 10295 frec2uzrand 10857 seqeq3 10904 seqf1oglem2 10972 seqf1og 10973 lsw1 11370 swrdccat 11523 ccats1pfxeqbi 11530 shftcan1 11615 remul2 11654 immul2 11661 fprodssdc 12376 ef0lem 12446 efieq1re 12558 dvdsnegb 12594 dvdscmul 12604 dvds2ln 12610 dvds2add 12611 dvds2sub 12612 gcdn0val 12757 rpmulgcd 12822 lcmval 12860 lcmn0val 12863 odzval 13043 pcmpt 13145 ballotfilemfp1 13283 grpsubval 13904 mulgnn0gzsum 13984 crngpropd 14428 opprringbg 14469 dvdsrtr 14492 isopn3 15317 dvexp 15903 dvexp2 15904 elply2 15927 bposlem5 16276 lgsval3 16303 lgsdinn0 16333 incistruhgr 16497 clwwlkn1loopb 16827 clwwlkext2edg 16829 clwwlknonex2 16846 eupth2lem3lem3fi 16877 subctctexmid 17196 |
| Copyright terms: Public domain | W3C validator |