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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.) |
Ref | Expression |
---|---|
eqtr3 | ⊢ ((𝐴 = 𝐶 ∧ 𝐵 = 𝐶) → 𝐴 = 𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqcom 2828 | . 2 ⊢ (𝐵 = 𝐶 ↔ 𝐶 = 𝐵) | |
2 | eqtr 2841 | . 2 ⊢ ((𝐴 = 𝐶 ∧ 𝐶 = 𝐵) → 𝐴 = 𝐵) | |
3 | 1, 2 | sylan2b 595 | 1 ⊢ ((𝐴 = 𝐶 ∧ 𝐵 = 𝐶) → 𝐴 = 𝐵) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 = wceq 1533 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-9 2120 ax-ext 2793 |
This theorem depends on definitions: df-bi 209 df-an 399 df-ex 1777 df-cleq 2814 |
This theorem is referenced by: neneor 3118 moeq 3698 euind 3715 reuind 3744 disjeq0 4405 ssprsseq 4752 mosneq 4767 prnebg 4780 prnesn 4784 prel12g 4788 3elpr2eq 4831 eusv1 5284 xpcan 6028 xpcan2 6029 funopg 6384 foco 6597 funopdmsn 6907 funsndifnop 6908 mpofun 7270 wfr3g 7947 oawordeulem 8174 ixpfi2 8816 isf32lem2 9770 fpwwe2lem13 10058 1re 10635 receu 11279 xrlttri 12526 injresinjlem 13151 cshwsexa 14180 fsumparts 15155 odd2np1 15684 prmreclem2 16247 divsfval 16814 isprs 17534 psrn 17813 grpinveu 18132 symgextf1 18543 symgfixf1 18559 efgrelexlemb 18870 lspextmo 19822 evlseu 20290 tgcmp 22003 sqf11 25710 dchrisumlem2 26060 axlowdimlem15 26736 axcontlem2 26745 wlksoneq1eq2 27440 spthonepeq 27527 uspgrn2crct 27580 wwlksnextinj 27671 frgrwopreglem5lem 28093 numclwwlk1lem2f1 28130 nsnlplig 28252 nsnlpligALT 28253 grpoinveu 28290 5oalem4 29428 rnbra 29878 xreceu 30593 bnj594 32179 bnj953 32206 frr3g 33116 sltsolem1 33175 nocvxminlem 33242 fnsingle 33375 funimage 33384 funtransport 33487 funray 33596 funline 33598 hilbert1.2 33611 lineintmo 33613 bj-bary1 34587 poimirlem13 34899 poimirlem14 34900 poimirlem17 34903 poimirlem27 34913 prter2 36011 cdleme 37690 kelac2lem 39657 frege124d 40099 2ffzoeq 43521 sprsymrelf1lem 43646 paireqne 43666 |
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