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| Mirrors > Home > ILE Home > Th. List > eqeq1i | GIF version | ||
| Description: Inference from equality to equivalence of equalities. (Contributed by NM, 5-Aug-1993.) |
| Ref | Expression |
|---|---|
| eqeq1i.1 | ⊢ 𝐴 = 𝐵 |
| Ref | Expression |
|---|---|
| eqeq1i | ⊢ (𝐴 = 𝐶 ↔ 𝐵 = 𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqeq1i.1 | . 2 ⊢ 𝐴 = 𝐵 | |
| 2 | eqeq1 2238 | . 2 ⊢ (𝐴 = 𝐵 → (𝐴 = 𝐶 ↔ 𝐵 = 𝐶)) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ (𝐴 = 𝐶 ↔ 𝐵 = 𝐶) |
| Colors of variables: wff set class |
| Syntax hints: ↔ wb 105 = 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: ssequn2 3380 dfss1 3411 disj 3543 disjr 3544 undisj1 3552 undisj2 3553 uneqdifeqim 3580 reusn 3742 rabsneu 3744 eusn 3745 iin0r 4259 opeqsn 4345 unisuc 4510 onsucelsucexmid 4628 sucprcreg 4647 onintexmid 4671 dmopab3 4944 dm0rn0 4948 ssdmres 5035 imadisj 5098 args 5105 intirr 5123 dminxp 5181 dfrel3 5194 cbviotavw 5292 fntpg 5386 fncnv 5396 f0rn0 5531 dff1o4 5591 dffv4g 5636 fvun2 5713 fnreseql 5757 funopdmsn 5834 riota1 5991 riota2df 5993 riotaeqimp 5996 fnbrovb 6063 fnotovb 6064 ovid 6138 ov 6141 ovg 6161 f1od2 6400 frec0g 6563 diffitest 7076 ismkvnex 7354 prarloclem5 7720 renegcl 8440 elznn0 9494 seqf1oglem1 10782 seqf1oglem2 10783 hashunlem 11068 maxclpr 11787 gausslemma2d 15804 lgseisenlem1 15805 2lgslem4 15838 edg0iedg0g 15923 ushgredgedg 16083 ushgredgedgloop 16085 uhgr0v0e 16091 1loopgrvd2fi 16162 ex-ceil 16344 nninfsellemqall 16643 nninfomni 16647 iswomni0 16682 |
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