Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > eqeqan12d | Structured version Visualization version GIF version |
Description: A useful inference for substituting definitions into an equality. See also eqeqan12dALT 2838. (Contributed by NM, 9-Aug-1994.) (Proof shortened by Andrew Salmon, 25-May-2011.) (Proof shortened by Wolf Lammen, 20-Nov-2019.) |
Ref | Expression |
---|---|
eqeqan12d.1 | ⊢ (𝜑 → 𝐴 = 𝐵) |
eqeqan12d.2 | ⊢ (𝜓 → 𝐶 = 𝐷) |
Ref | Expression |
---|---|
eqeqan12d | ⊢ ((𝜑 ∧ 𝜓) → (𝐴 = 𝐶 ↔ 𝐵 = 𝐷)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqeqan12d.1 | . . 3 ⊢ (𝜑 → 𝐴 = 𝐵) | |
2 | 1 | adantr 483 | . 2 ⊢ ((𝜑 ∧ 𝜓) → 𝐴 = 𝐵) |
3 | eqeqan12d.2 | . . 3 ⊢ (𝜓 → 𝐶 = 𝐷) | |
4 | 3 | adantl 484 | . 2 ⊢ ((𝜑 ∧ 𝜓) → 𝐶 = 𝐷) |
5 | 2, 4 | eqeq12d 2836 | 1 ⊢ ((𝜑 ∧ 𝜓) → (𝐴 = 𝐶 ↔ 𝐵 = 𝐷)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 208 ∧ wa 398 = wceq 1536 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1969 ax-7 2014 ax-9 2123 ax-ext 2792 |
This theorem depends on definitions: df-bi 209 df-an 399 df-ex 1780 df-cleq 2813 |
This theorem is referenced by: eqeqan12rd 2839 eqfnfv2 6796 f1mpt 7012 soisores 7073 xpopth 7723 f1o2ndf1 7811 fnwelem 7818 fnse 7820 tz7.48lem 8070 ecopoveq 8391 xpdom2 8605 unfilem2 8776 wemaplem1 9003 suc11reg 9075 oemapval 9139 cantnf 9149 wemapwe 9153 r0weon 9431 infxpen 9433 fodomacn 9475 sornom 9692 fin1a2lem2 9816 fin1a2lem4 9818 neg11 10930 subeqrev 11055 rpnnen1lem6 12375 cnref1o 12378 xneg11 12602 injresinj 13155 modadd1 13273 modmul1 13289 modlteq 13310 sq11 13493 hashen 13704 fz1eqb 13712 eqwrd 13904 s111 13964 ccatopth 14073 wrd2ind 14080 wwlktovf1 14316 cj11 14516 sqrt11 14617 sqabs 14662 recan 14691 reeff1 15468 efieq 15511 eulerthlem2 16114 vdwlem12 16323 xpsff1o 16835 ismhm 17953 gsmsymgreq 18555 symgfixf1 18560 odf1 18684 sylow1 18723 frgpuplem 18893 isdomn 20062 cygznlem3 20711 psgnghm 20719 tgtop11 21585 fclsval 22611 vitali 24209 recosf1o 25117 dvdsmulf1o 25769 fsumvma 25787 brcgr 26684 axlowdimlem15 26740 axcontlem1 26748 axcontlem4 26751 axcontlem7 26754 axcontlem8 26755 iswlk 27390 wlkswwlksf1o 27655 wwlksnextinj 27675 clwlkclwwlkf1 27786 clwwlkf1 27826 numclwwlkqhash 28152 grpoinvf 28307 hial2eq2 28882 qusker 30939 bnj554 32192 erdszelem9 32467 sategoelfvb 32687 mrsubff1 32782 msubff1 32824 mvhf1 32827 fneval 33721 topfneec2 33725 bj-imdirval3 34498 f1omptsnlem 34641 f1omptsn 34642 rdgeqoa 34675 poimirlem4 34931 poimirlem26 34953 poimirlem27 34954 ismtyval 35111 extep 35573 brdmqss 35914 wepwsolem 39718 fnwe2val 39725 aomclem8 39737 relexp0eq 40120 sprsymrelf1 43732 fmtnof1 43771 fmtnofac1 43806 prmdvdsfmtnof1 43823 sfprmdvdsmersenne 43842 isupwlk 44085 uspgrsprf1 44096 ismgmhm 44124 2zlidl 44279 rrx2xpref1o 44779 rrx2plord 44781 rrx2plordisom 44784 sphere 44808 line2ylem 44812 |
Copyright terms: Public domain | W3C validator |