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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 1537 |
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 1970 ax-7 2015 ax-9 2124 ax-ext 2793 |
This theorem depends on definitions: df-bi 209 df-an 399 df-ex 1781 df-cleq 2814 |
This theorem is referenced by: neneor 3118 moeq 3698 euind 3715 reuind 3744 disjeq0 4405 ssprsseq 4758 mosneq 4773 prnebg 4786 prnesn 4790 prel12g 4794 3elpr2eq 4837 eusv1 5292 xpcan 6033 xpcan2 6034 funopg 6389 foco 6602 funopdmsn 6912 funsndifnop 6913 mpofun 7276 wfr3g 7953 oawordeulem 8180 ixpfi2 8822 isf32lem2 9776 fpwwe2lem13 10064 1re 10641 receu 11285 xrlttri 12533 injresinjlem 13158 cshwsexa 14186 fsumparts 15161 odd2np1 15690 prmreclem2 16253 divsfval 16820 isprs 17540 psrn 17819 grpinveu 18138 symgextf1 18549 symgfixf1 18565 efgrelexlemb 18876 lspextmo 19828 evlseu 20296 tgcmp 22009 sqf11 25716 dchrisumlem2 26066 axlowdimlem15 26742 axcontlem2 26751 wlksoneq1eq2 27446 spthonepeq 27533 uspgrn2crct 27586 wwlksnextinj 27677 frgrwopreglem5lem 28099 numclwwlk1lem2f1 28136 nsnlplig 28258 nsnlpligALT 28259 grpoinveu 28296 5oalem4 29434 rnbra 29884 xreceu 30598 bnj594 32184 bnj953 32211 frr3g 33121 sltsolem1 33180 nocvxminlem 33247 fnsingle 33380 funimage 33389 funtransport 33492 funray 33601 funline 33603 hilbert1.2 33616 lineintmo 33618 bj-bary1 34596 poimirlem13 34920 poimirlem14 34921 poimirlem17 34924 poimirlem27 34934 prter2 36032 cdleme 37711 kelac2lem 39684 frege124d 40126 2ffzoeq 43548 sprsymrelf1lem 43673 paireqne 43693 |
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