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| Mirrors > Home > MPE Home > Th. List > rexeqbidv | Structured version Visualization version GIF version | ||
| Description: Equality deduction for restricted universal quantifier. (Contributed by NM, 6-Nov-2007.) Remove usage of ax-10 2178, ax-11 2194, and ax-12 2213 and reduce distinct variable conditions. (Revised by Steven Nguyen, 30-Apr-2023.) |
| Ref | Expression |
|---|---|
| raleqbidv.1 | ⊢ (𝜑 → 𝐴 = 𝐵) |
| raleqbidv.2 | ⊢ (𝜑 → (𝜓 ↔ 𝜒)) |
| Ref | Expression |
|---|---|
| rexeqbidv | ⊢ (𝜑 → (∃𝑥 ∈ 𝐴 𝜓 ↔ ∃𝑥 ∈ 𝐵 𝜒)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | raleqbidv.1 | . . . 4 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 2 | 1 | eleq2d 2847 | . . 3 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↔ 𝑥 ∈ 𝐵)) |
| 3 | raleqbidv.2 | . . 3 ⊢ (𝜑 → (𝜓 ↔ 𝜒)) | |
| 4 | 2, 3 | anbi12d 644 | . 2 ⊢ (𝜑 → ((𝑥 ∈ 𝐴 ∧ 𝜓) ↔ (𝑥 ∈ 𝐵 ∧ 𝜒))) |
| 5 | 4 | rexbidv2 3183 | 1 ⊢ (𝜑 → (∃𝑥 ∈ 𝐴 𝜓 ↔ ∃𝑥 ∈ 𝐵 𝜒)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 = wceq 1570 ∈ wcel 2145 ∃wrex 3087 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2733 |
| This proof depends on definitions: df-bi 210 df-an 402 df-ex 1813 df-cleq 2753 df-clel 2836 df-rex 3088 |
| This theorem is used by: frd 5608 supeq123d 9442 fpwwe2lem12 10727 vdwpc 17158 ramval 17186 mreexexlemd 17818 iscat 17846 iscatd 17847 catidex 17848 idressidex 18861 gsumval2a 18874 ismnddef 18925 mndpropd 18951 isgrp 19150 isgrpd2e 19166 cayleyth 19629 psgnfval 19714 iscyg 20093 ltbval 22352 opsrval 22355 scmatval 22819 pmatcollpw3fi1lem2 23105 pmatcollpw3fi1 23106 neiptopnei 23450 is1stc 23759 2ndc1stc 23769 2ndcsep 23778 islly 23787 isnlly 23788 ucnval 24595 imasdsf1olem 24692 met2ndc 24842 evthicc 25780 elmade2 28244 addsval 28348 mulsval 28495 istrkgb 28917 istrkge 28919 istrkgld 28921 legval 29047 ishpg 29237 plngval 29255 lnssplng 29270 iscgra 29316 isinag 29357 isleag 29366 cgrabasimass 29378 nbgrval 29917 nb3grprlem2 29962 1loopgrvd0 30085 erclwwlkeq 30609 eucrctshift 30844 isplig 31078 nmoofval 31364 erlval 33819 idomsubr 33871 elrsp 33927 1arithidom 34069 dfufd2lem 34081 fldextrspunlsp 34306 extdgfialglem1 34324 constrsuc 34370 reprsuc 35244 istrkg2d 35295 iscvm 36024 cvmlift2lem13 36080 br8 36521 br6 36522 br4 36523 brsegle 36873 hilbert1.1 36919 pibp21 38338 poimirlem26 38564 poimirlem28 38566 poimirlem29 38567 cover2g 38650 isexid 38781 isrngo 38831 isrngod 38832 isgrpda 38889 lshpset 40035 cvrfval 40325 isatl 40356 ishlat1 40409 llnset 40562 lplnset 40586 lvolset 40629 lineset 40795 lcfl7N 42558 lcfrlem8 42606 lcfrlem9 42607 lcf1o 42608 hvmapffval 42815 hvmapfval 42816 hvmapval 42817 prjspval 43631 mzpcompact2lem 43761 eldioph 43768 aomclem8 44062 tfsconcatun 44338 clsk1independent 45045 ovnval 47550 sprval 48560 nnsum3primes4 48885 nnsum3primesprm 48887 nnsum3primesgbe 48889 wtgoldbnnsum4prm 48899 bgoldbnnsum3prm 48901 clnbgrval 48919 gpg3kgrtriex 49186 grlimedgnedg 49228 zlidlring 49330 uzlidlring 49331 lcoop 49522 ldepsnlinc 49619 nnpw2p 49697 lines 49842 iscnrm3r 50055 |
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