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Mirrors > Home > MPE Home > Th. List > equcoms | Structured version Visualization version GIF version |
Description: An inference commuting equality in antecedent. Used to eliminate the need for a syllogism. (Contributed by NM, 10-Jan-1993.) |
Ref | Expression |
---|---|
equcoms.1 | ⊢ (𝑥 = 𝑦 → 𝜑) |
Ref | Expression |
---|---|
equcoms | ⊢ (𝑦 = 𝑥 → 𝜑) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | equcomi 2024 | . 2 ⊢ (𝑦 = 𝑥 → 𝑥 = 𝑦) | |
2 | equcoms.1 | . 2 ⊢ (𝑥 = 𝑦 → 𝜑) | |
3 | 1, 2 | syl 17 | 1 ⊢ (𝑦 = 𝑥 → 𝜑) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 |
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 |
This theorem depends on definitions: df-bi 210 df-an 400 df-ex 1782 |
This theorem is referenced by: equtr 2028 equeuclr 2030 spfw 2040 cbvalw 2042 alcomiw 2050 alcomiwOLD 2051 ax8 2117 elequ1 2118 ax9 2125 elequ2 2126 stdpc7 2249 sbequ12r 2251 cbvalv1 2350 cbval 2405 cbvalvOLD 2409 sb9 2538 sbequALT 2573 ax9ALT 2794 sbralie 3418 reu8 3672 sbcco2 3747 reu8nf 3806 sbcop1 5344 opeliunxp 5583 elrnmpt1 5794 elidinxp 5878 fvn0ssdmfun 6819 elabrex 6980 tfisi 7553 tfinds2 7558 opabex3d 7648 opabex3rd 7649 opabex3 7650 mpocurryd 7918 boxriin 8487 ixpiunwdom 9038 elirrv 9044 rabssnn0fi 13349 fproddivf 15333 prmodvdslcmf 16373 1mavmul 21153 ptbasfi 22186 elmptrab 22432 pcoass 23629 iundisj2 24153 dchrisumlema 26072 dchrisumlem2 26074 cusgrfilem2 27246 frgrncvvdeq 28094 frgr2wwlk1 28114 iundisj2f 30353 iundisj2fi 30546 bnj1014 32343 cvmsss2 32634 gonarlem 32754 ax8dfeq 33156 bj-ssbid1ALT 34111 bj-cbvexw 34122 bj-sb 34134 finxpreclem6 34813 ralssiun 34824 wl-nfs1t 34942 wl-equsb4 34958 wl-euequf 34975 wl-ax11-lem8 34989 matunitlindflem1 35053 poimirlem26 35083 mblfinlem2 35095 sdclem2 35180 axc11-o 36247 rexzrexnn0 39745 elabrexg 41675 disjinfi 41820 dvnmptdivc 42580 iblsplitf 42612 vonn0ioo2 43329 vonn0icc2 43331 funressnvmo 43637 ichcircshi 43971 ichreuopeq 43990 paireqne 44028 reuopreuprim 44043 uspgrsprf1 44375 opeliun2xp 44734 |
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