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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 2816. (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 484 | . 2 ⊢ ((𝜑 ∧ 𝜓) → 𝐴 = 𝐵) |
3 | eqeqan12d.2 | . . 3 ⊢ (𝜓 → 𝐶 = 𝐷) | |
4 | 3 | adantl 485 | . 2 ⊢ ((𝜑 ∧ 𝜓) → 𝐶 = 𝐷) |
5 | 2, 4 | eqeq12d 2814 | 1 ⊢ ((𝜑 ∧ 𝜓) → (𝐴 = 𝐶 ↔ 𝐵 = 𝐷)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 209 ∧ 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: eqeqan12rd 2817 eqfnfv2 6780 f1mpt 6997 soisores 7059 xpopth 7712 f1o2ndf1 7801 fnwelem 7808 fnse 7810 tz7.48lem 8060 ecopoveq 8381 xpdom2 8595 unfilem2 8767 wemaplem1 8994 suc11reg 9066 oemapval 9130 cantnf 9140 wemapwe 9144 r0weon 9423 infxpen 9425 fodomacn 9467 sornom 9688 fin1a2lem2 9812 fin1a2lem4 9814 neg11 10926 subeqrev 11051 rpnnen1lem6 12369 cnref1o 12372 xneg11 12596 injresinj 13153 modadd1 13271 modmul1 13287 modlteq 13308 sq11 13492 hashen 13703 fz1eqb 13711 eqwrd 13900 s111 13960 ccatopth 14069 wrd2ind 14076 wwlktovf1 14312 cj11 14513 sqrt11 14614 sqabs 14659 recan 14688 reeff1 15465 efieq 15508 eulerthlem2 16109 vdwlem12 16318 xpsff1o 16832 ismhm 17950 gsmsymgreq 18552 symgfixf1 18557 odf1 18681 sylow1 18720 frgpuplem 18890 isdomn 20060 cygznlem3 20261 psgnghm 20269 tgtop11 21587 fclsval 22613 vitali 24217 recosf1o 25127 dvdsmulf1o 25779 fsumvma 25797 brcgr 26694 axlowdimlem15 26750 axcontlem1 26758 axcontlem4 26761 axcontlem7 26764 axcontlem8 26765 iswlk 27400 wlkswwlksf1o 27665 wwlksnextinj 27685 clwlkclwwlkf1 27795 clwwlkf1 27834 numclwwlkqhash 28160 grpoinvf 28315 hial2eq2 28890 qusker 30969 bnj554 32281 erdszelem9 32559 sategoelfvb 32779 mrsubff1 32874 msubff1 32916 mvhf1 32919 fneval 33813 topfneec2 33817 bj-imdirval3 34599 f1omptsnlem 34753 f1omptsn 34754 rdgeqoa 34787 poimirlem4 35061 poimirlem26 35083 poimirlem27 35084 ismtyval 35238 extep 35700 brdmqss 36041 wepwsolem 39986 fnwe2val 39993 aomclem8 40005 relexp0eq 40402 sprsymrelf1 44013 fmtnof1 44052 fmtnofac1 44087 prmdvdsfmtnof1 44104 sfprmdvdsmersenne 44121 isupwlk 44364 uspgrsprf1 44375 ismgmhm 44403 2zlidl 44558 rrx2xpref1o 45132 rrx2plord 45134 rrx2plordisom 45137 sphere 45161 line2ylem 45165 |
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