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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 2021 | . 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 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 |
This theorem depends on definitions: df-bi 206 df-an 398 df-ex 1783 |
This theorem is referenced by: equtr 2025 equeuclr 2027 spfw 2037 cbvalw 2039 alcomiw 2047 ax8 2113 elequ1 2114 ax9 2121 elequ2 2122 stdpc7 2243 sbequ12r 2245 cbvalv1 2338 cbval 2398 sb9 2519 ax9ALT 2728 sbralieALT 3356 rabrabi 3451 reurab 3697 reu8 3729 sbcco2 3804 reu8nf 3871 notabw 4303 ab0OLD 4375 sbcop1 5488 opeliunxp 5742 elrnmpt1 5956 elidinxp 6042 fvn0ssdmfun 7074 elabrex 7239 riotarab 7405 tfisi 7845 tfinds2 7850 opabex3d 7949 opabex3rd 7950 opabex3 7951 xpord2indlem 8130 xpord3inddlem 8137 mpocurryd 8251 boxriin 8931 ixpiunwdom 9582 elirrv 9588 rabssnn0fi 13948 fproddivf 15928 prmodvdslcmf 16977 eqg0subg 19068 1mavmul 22042 ptbasfi 23077 elmptrab 23323 pcoass 24532 iundisj2 25058 dchrisumlema 26981 dchrisumlem2 26983 cusgrfilem2 28703 frgrncvvdeq 29552 frgr2wwlk1 29572 iundisj2f 31809 iundisj2fi 31996 bnj1014 33961 cvmsss2 34254 gonarlem 34374 ax8dfeq 34759 bj-ssbid1ALT 35531 bj-cbvexw 35542 bj-sb 35554 finxpreclem6 36266 ralssiun 36277 wl-nfs1t 36395 wl-equsb4 36411 wl-euequf 36428 wl-ax11-lem8 36443 matunitlindflem1 36473 poimirlem26 36503 mblfinlem2 36515 sdclem2 36599 axc11-o 37810 rexzrexnn0 41528 elabrexg 43714 disjinfi 43877 dvnmptdivc 44641 iblsplitf 44673 vonn0ioo2 45393 vonn0icc2 45395 funressnvmo 45742 ichcircshi 46109 ichreuopeq 46128 paireqne 46166 reuopreuprim 46181 uspgrsprf1 46512 opeliun2xp 46962 |
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