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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 2772 | . 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 1569 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-9 2154 ax-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-ex 1812 df-cleq 2752 |
| This theorem is used by: neneor 3057 moeq 3664 euind 3681 reuind 3710 disjeq0 4408 ssprsseq 4780 mosneq 4796 prnebg 4810 prnesn 4814 prel12g 4818 3elpr2eq 4833 eusv1 5353 axprglem 5394 xpcan 6170 xpcan2 6171 funopg 6579 funopdmsn 7159 funsndifnop 7160 fvf1pr 7319 resf1extb 7950 wfr3g 8345 oawordeulem 8570 nnasmo 8680 en1eqsn 9274 ixpfi2 9347 frr3g 9767 isf32lem2 10439 fpwwe2lem12 10734 1re 11315 receu 11968 xrlttri 13275 injresinjlem 13932 fsumparts 15982 odd2np1 16520 prmreclem2 17104 divsfval 17728 isprs 18479 psrn 18758 grpinveu 19194 symgextf1 19644 symgfixf1 19660 efgrelexlemb 19973 lspextmo 21340 evlseu 22401 tgcmp 23728 sqf11 27475 dchrisumlem2 27826 ltssolem1 28041 nocvxminlem 28149 divsmo 28579 axlowdimlem15 29543 axcontlem2 29552 wlksoneq1eq2 30252 spthonepeq 30347 uspgrn2crct 30406 wwlksnextinj 30497 frgrwopreglem5lem 30930 numclwwlk1lem2f1 30967 nsnlplig 31092 nsnlpligALT 31093 grpoinveu 31130 5oalem4 32268 rnbra 32718 xreceu 33538 bnj594 35592 bnj953 35619 ordunmax 35769 scottsn 35810 fnsingle 36805 funimage 36814 funtransport 36920 funray 37029 funline 37031 hilbert1.2 37044 lineintmo 37046 bj-bary1 38370 poimirlem13 38688 poimirlem14 38689 poimirlem17 38692 poimirlem27 38702 mopre 39540 sucmapleftuniq 39559 antisymressn 39603 disjdmqscossss 39975 prter2 40075 cdleme 41754 rediveud 43631 kelac2lem 44203 frege124d 44898 2ffzoeq 48534 sprsymrelf1lem 48709 paireqne 48729 usgrexmpl2trifr 49271 gpg5grlic 49328 pgnbgreunbgrlem2 49351 mof0ALT 50087 mofsn 50091 f1omoOLD 50144 oppcendc 50268 parhomidval 50882 |
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