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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 2841. (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 2839 | 1 ⊢ ((𝜑 ∧ 𝜓) → (𝐴 = 𝐶 ↔ 𝐵 = 𝐷)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 208 ∧ 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 2795 |
This theorem depends on definitions: df-bi 209 df-an 399 df-ex 1781 df-cleq 2816 |
This theorem is referenced by: eqeqan12rd 2842 eqfnfv2 6805 f1mpt 7021 soisores 7082 xpopth 7732 f1o2ndf1 7820 fnwelem 7827 fnse 7829 tz7.48lem 8079 ecopoveq 8400 xpdom2 8614 unfilem2 8785 wemaplem1 9012 suc11reg 9084 oemapval 9148 cantnf 9158 wemapwe 9162 r0weon 9440 infxpen 9442 fodomacn 9484 sornom 9701 fin1a2lem2 9825 fin1a2lem4 9827 neg11 10939 subeqrev 11064 rpnnen1lem6 12384 cnref1o 12387 xneg11 12611 injresinj 13161 modadd1 13279 modmul1 13295 modlteq 13316 sq11 13499 hashen 13710 fz1eqb 13718 eqwrd 13911 s111 13971 ccatopth 14080 wrd2ind 14087 wwlktovf1 14323 cj11 14523 sqrt11 14624 sqabs 14669 recan 14698 reeff1 15475 efieq 15518 eulerthlem2 16121 vdwlem12 16330 xpsff1o 16842 ismhm 17960 gsmsymgreq 18562 symgfixf1 18567 odf1 18691 sylow1 18730 frgpuplem 18900 isdomn 20069 cygznlem3 20718 psgnghm 20726 tgtop11 21592 fclsval 22618 vitali 24216 recosf1o 25121 dvdsmulf1o 25773 fsumvma 25791 brcgr 26688 axlowdimlem15 26744 axcontlem1 26752 axcontlem4 26755 axcontlem7 26758 axcontlem8 26759 iswlk 27394 wlkswwlksf1o 27659 wwlksnextinj 27679 clwlkclwwlkf1 27790 clwwlkf1 27830 numclwwlkqhash 28156 grpoinvf 28311 hial2eq2 28886 qusker 30920 bnj554 32173 erdszelem9 32448 sategoelfvb 32668 mrsubff1 32763 msubff1 32805 mvhf1 32808 fneval 33702 topfneec2 33706 bj-imdirval3 34476 f1omptsnlem 34619 f1omptsn 34620 rdgeqoa 34653 poimirlem4 34898 poimirlem26 34920 poimirlem27 34921 ismtyval 35080 extep 35542 brdmqss 35883 wepwsolem 39649 fnwe2val 39656 aomclem8 39668 relexp0eq 40053 sprsymrelf1 43665 fmtnof1 43704 fmtnofac1 43739 prmdvdsfmtnof1 43756 sfprmdvdsmersenne 43775 isupwlk 44018 uspgrsprf1 44029 ismgmhm 44057 2zlidl 44212 rrx2xpref1o 44712 rrx2plord 44714 rrx2plordisom 44717 sphere 44741 line2ylem 44745 |
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