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| Mirrors > Home > MPE Home > Th. List > eqtr3 | Structured version Visualization version GIF version | ||
| Description: A transitive law for class equality. (Contributed by NM, 20-May-2005.) (Proof shortened by Wolf Lammen, 24-Oct-2024.) |
| Ref | Expression |
|---|---|
| eqtr3 | ⊢ ((𝐴 = 𝐶 ∧ 𝐵 = 𝐶) → 𝐴 = 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqeq2 2746 | . 2 ⊢ (𝐵 = 𝐶 → (𝐴 = 𝐵 ↔ 𝐴 = 𝐶)) | |
| 2 | 1 | biimparc 479 | 1 ⊢ ((𝐴 = 𝐶 ∧ 𝐵 = 𝐶) → 𝐴 = 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1541 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-9 2123 ax-ext 2706 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-ex 1781 df-cleq 2726 |
| This theorem is referenced by: neneor 3030 moeq 3663 euind 3680 reuind 3709 disjeq0 4406 ssprsseq 4779 mosneq 4796 prnebg 4810 prnesn 4814 prel12g 4818 3elpr2eq 4860 eusv1 5334 xpcan 6132 xpcan2 6133 funopg 6524 funopdmsn 7093 funsndifnop 7094 fvf1pr 7251 resf1extb 7874 wfr3g 8259 oawordeulem 8479 nnasmo 8589 en1eqsn 9173 ixpfi2 9248 frr3g 9666 isf32lem2 10262 fpwwe2lem12 10551 1re 11130 receu 11780 xrlttri 13051 injresinjlem 13704 fsumparts 15727 odd2np1 16266 prmreclem2 16843 divsfval 17466 isprs 18217 psrn 18496 grpinveu 18902 symgextf1 19348 symgfixf1 19364 efgrelexlemb 19677 lspextmo 21006 evlseu 22036 tgcmp 23343 sqf11 27103 dchrisumlem2 27455 sltsolem1 27641 nocvxminlem 27744 divsmo 28153 axlowdimlem15 28978 axcontlem2 28987 wlksoneq1eq2 29685 spthonepeq 29774 uspgrn2crct 29830 wwlksnextinj 29921 frgrwopreglem5lem 30344 numclwwlk1lem2f1 30381 nsnlplig 30505 nsnlpligALT 30506 grpoinveu 30543 5oalem4 31681 rnbra 32131 xreceu 32952 bnj594 35017 bnj953 35044 fnsingle 36060 funimage 36069 funtransport 36174 funray 36283 funline 36285 hilbert1.2 36298 lineintmo 36300 bj-bary1 37456 poimirlem13 37773 poimirlem14 37774 poimirlem17 37777 poimirlem27 37787 mopre 38584 sucmapleftuniq 38602 antisymressn 38646 disjdmqscossss 39001 prter2 39080 cdleme 40759 rediveud 42640 kelac2lem 43248 frege124d 43944 2ffzoeq 47515 sprsymrelf1lem 47679 paireqne 47699 usgrexmpl2trifr 48225 gpg5grlic 48282 pgnbgreunbgrlem2 48305 mof0ALT 49027 mofsn 49031 f1omoOLD 49081 oppcendc 49205 |
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