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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 2805 | . 2 ⊢ (𝐵 = 𝐶 ↔ 𝐶 = 𝐵) | |
2 | eqtr 2818 | . 2 ⊢ ((𝐴 = 𝐶 ∧ 𝐶 = 𝐵) → 𝐴 = 𝐵) | |
3 | 1, 2 | sylan2b 596 | 1 ⊢ ((𝐴 = 𝐶 ∧ 𝐵 = 𝐶) → 𝐴 = 𝐵) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 399 = wceq 1538 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-9 2121 ax-ext 2770 |
This theorem depends on definitions: df-bi 210 df-an 400 df-ex 1782 df-cleq 2791 |
This theorem is referenced by: neneor 3086 moeq 3646 euind 3663 reuind 3692 disjeq0 4363 ssprsseq 4718 mosneq 4733 prnebg 4746 prnesn 4750 prel12g 4754 3elpr2eq 4799 eusv1 5257 xpcan 6000 xpcan2 6001 funopg 6358 foco 6577 funopdmsn 6889 funsndifnop 6890 mpofun 7255 wfr3g 7936 oawordeulem 8163 ixpfi2 8806 isf32lem2 9765 fpwwe2lem13 10053 1re 10630 receu 11274 xrlttri 12520 injresinjlem 13152 cshwsexa 14177 fsumparts 15153 odd2np1 15682 prmreclem2 16243 divsfval 16812 isprs 17532 psrn 17811 grpinveu 18130 symgextf1 18541 symgfixf1 18557 efgrelexlemb 18868 lspextmo 19821 evlseu 20755 tgcmp 22006 sqf11 25724 dchrisumlem2 26074 axlowdimlem15 26750 axcontlem2 26759 wlksoneq1eq2 27454 spthonepeq 27541 uspgrn2crct 27594 wwlksnextinj 27685 frgrwopreglem5lem 28105 numclwwlk1lem2f1 28142 nsnlplig 28264 nsnlpligALT 28265 grpoinveu 28302 5oalem4 29440 rnbra 29890 xreceu 30624 bnj594 32294 bnj953 32321 frr3g 33234 sltsolem1 33293 nocvxminlem 33360 fnsingle 33493 funimage 33502 funtransport 33605 funray 33714 funline 33716 hilbert1.2 33729 lineintmo 33731 bj-bary1 34726 poimirlem13 35070 poimirlem14 35071 poimirlem17 35074 poimirlem27 35084 prter2 36177 cdleme 37856 kelac2lem 40008 frege124d 40462 2ffzoeq 43885 sprsymrelf1lem 44008 paireqne 44028 |
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