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| Mirrors > Home > ILE Home > Th. List > eqtr4id | GIF version | ||
| Description: An equality transitivity deduction. (Contributed by NM, 29-Mar-1998.) |
| Ref | Expression |
|---|---|
| eqtr4id.2 | ⊢ 𝐴 = 𝐵 |
| eqtr4id.1 | ⊢ (𝜑 → 𝐶 = 𝐵) |
| Ref | Expression |
|---|---|
| eqtr4id | ⊢ (𝜑 → 𝐴 = 𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqtr4id.1 | . 2 ⊢ (𝜑 → 𝐶 = 𝐵) | |
| 2 | eqtr4id.2 | . . 3 ⊢ 𝐴 = 𝐵 | |
| 3 | 2 | eqcomi 2242 | . 2 ⊢ 𝐵 = 𝐴 |
| 4 | 1, 3 | eqtr2di 2288 | 1 ⊢ (𝜑 → 𝐴 = 𝐶) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 = 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: iftrue 3645 iffalse 3648 difprsn1 3854 dmmptg 5285 relcoi1 5319 funimacnv 5457 dmmptd 5514 dffv3g 5691 dfimafn 5751 fvco2 5774 dfimafnf 5955 isoini 6024 iotaexel 6043 fvmpopr2d 6225 oprabco 6453 suppcofn 6506 ixpconstg 6989 unfiexmid 7225 undifdc 7231 sbthlemi4 7277 sbthlemi5 7278 sbthlemi6 7279 supval2ti 7335 exmidfodomrlemim 7553 suplocexprlemex 8089 eqneg 9063 zeo 9753 fseq1p1m1 10503 seq3val 10899 seqvalcd 10900 hashfzo 11265 hashxp 11269 hashfibclem 11284 wrdval 11309 wrdnval 11337 swrdccat3blem 11513 fsumconst 12223 modfsummod 12227 telfsumo 12235 fprodconst 12389 mulgcd 12795 algcvg 12828 phiprmpw 13002 phisum 13021 strslfv3 13400 resseqnbasd 13429 imasplusg 13631 imasmulr 13632 ismgmid 13699 gzsumshift 14151 pwssnf1o 14213 pws0g 14215 dfrhm2 14463 subrg1 14541 2idlbas 14854 rnascl 15036 psrbagfi 15061 psrlinv 15077 mplbascoe 15084 mplplusgg 15096 uptx 15377 resubmet 15659 ply1termlem 15845 birthdaylem1g 16093 birthdaylem2 16094 lgsval4lem 16142 lgsquadlem2 16209 m1lgs 16216 uspgrf1oedg 16429 |
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