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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 2775 | . 2 ⊢ (𝐵 = 𝐶 → (𝐴 = 𝐵 ↔ 𝐴 = 𝐶)) | |
| 2 | 1 | biimparc 485 | 1 ⊢ ((𝐴 = 𝐶 ∧ 𝐵 = 𝐶) → 𝐴 = 𝐵) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-9 2157 ax-ext 2735 |
| This proof depends on definitions: df-bi 210 df-an 402 df-ex 1813 df-cleq 2755 |
| This theorem is used by: neneor 3061 moeq 3668 euind 3685 reuind 3714 disjeq0 4412 ssprsseq 4786 mosneq 4802 prnebg 4816 prnesn 4820 prel12g 4824 3elpr2eq 4839 eusv1 5360 axprglem 5401 xpcan 6186 xpcan2 6187 funopg 6602 funopdmsn 7186 funsndifnop 7187 fvf1pr 7346 resf1extb 7980 wfr3g 8375 oawordeulem 8600 nnasmo 8710 en1eqsn 9304 ixpfi2 9377 frr3g 9797 isf32lem2 10471 fpwwe2lem12 10766 1re 11347 receu 12001 xrlttri 13308 injresinjlem 13965 fsumparts 16017 odd2np1 16555 prmreclem2 17139 divsfval 17769 isprs 18520 psrn 18799 grpinveu 19235 symgextf1 19686 symgfixf1 19702 efgrelexlemb 20015 lspextmo 21382 evlseu 22447 tgcmp 23774 sqf11 27523 dchrisumlem2 27874 ltssolem1 28089 nocvxminlem 28197 divsmo 28627 axlowdimlem15 29591 axcontlem2 29600 wlksoneq1eq2 30300 spthonepeq 30395 uspgrn2crct 30454 wwlksnextinj 30545 frgrwopreglem5lem 30978 numclwwlk1lem2f1 31015 nsnlplig 31140 nsnlpligALT 31141 grpoinveu 31178 5oalem4 32316 rnbra 32766 xreceu 33584 bnj594 35653 bnj953 35680 ordunmax 35833 scottsn 35875 fnsingle 36896 funimage 36905 funtransport 37011 funray 37120 funline 37122 hilbert1.2 37135 lineintmo 37137 bj-bary1 38501 poimirlem13 38819 poimirlem14 38820 poimirlem17 38823 poimirlem27 38833 mopre 39669 sucmapleftuniq 39688 antisymressn 39732 disjdmqscossss 40104 prter2 40204 cdleme 41883 rediveud 43760 kelac2lem 44332 frege124d 45022 2ffzoeq 48671 sprsymrelf1lem 48846 paireqne 48866 usgrexmpl2trifr 49408 gpg5grlic 49465 pgnbgreunbgrlem2 49488 mof0ALT 50282 mofsn 50286 f1omoOLD 50339 oppcendc 50463 parhomidval 51077 |
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