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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 2180, ax-11 2197, and ax-12 2216 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 2850 | . . 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 3186 | 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 2147 ∃wrex 3090 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-ext 2735 |
| This proof depends on definitions: df-bi 210 df-an 402 df-ex 1813 df-cleq 2755 df-clel 2839 df-rex 3091 |
| This theorem is used by: frd 5615 supeq123d 9479 fpwwe2lem12 10766 vdwpc 17202 ramval 17230 mreexexlemd 17868 iscat 17896 iscatd 17897 catidex 17898 idressidex 18911 gsumval2a 18924 ismnddef 18975 mndpropd 19001 isgrp 19200 isgrpd2e 19216 cayleyth 19680 psgnfval 19765 iscyg 20144 ltbval 22407 opsrval 22410 scmatval 22874 pmatcollpw3fi1lem2 23160 pmatcollpw3fi1 23161 neiptopnei 23505 is1stc 23814 2ndc1stc 23824 2ndcsep 23833 islly 23842 isnlly 23843 ucnval 24650 imasdsf1olem 24747 met2ndc 24897 evthicc 25835 elmade2 28301 addsval 28405 mulsval 28552 istrkgb 28974 istrkge 28976 istrkgld 28978 legval 29104 ishpg 29294 plngval 29312 lnssplng 29327 iscgra 29373 isinag 29414 isleag 29423 cgrabasimass 29435 nbgrval 29974 nb3grprlem2 30019 1loopgrvd0 30142 erclwwlkeq 30666 eucrctshift 30901 isplig 31135 nmoofval 31421 erlval 33918 isedom 33953 idomsubr 33975 elrsp 34031 1arithidom 34173 dfufd2lem 34185 fldextrspunlsp 34417 extdgfialglem1 34435 constrsuc 34481 reprsuc 35355 istrkg2d 35406 iscvm 36232 cvmlift2lem13 36288 br8 36736 br6 36737 br4 36738 brsegle 37088 hilbert1.1 37134 pibp21 38606 poimirlem26 38832 poimirlem28 38834 poimirlem29 38835 cover2g 38918 isexid 39047 isrngo 39097 isrngod 39098 isgrpda 39155 lshpset 40301 cvrfval 40591 isatl 40622 ishlat1 40675 llnset 40828 lplnset 40852 lvolset 40895 lineset 41061 lcfl7N 42824 lcfrlem8 42872 lcfrlem9 42873 lcf1o 42874 hvmapffval 43081 hvmapfval 43082 hvmapval 43083 prjspval 43897 mzpcompact2lem 44028 eldioph 44035 aomclem8 44329 tfsconcatun 44600 clsk1independent 45307 ovnval 47824 sprval 48834 nnsum3primes4 49159 nnsum3primesprm 49161 nnsum3primesgbe 49163 wtgoldbnnsum4prm 49173 bgoldbnnsum3prm 49175 clnbgrval 49193 gpg3kgrtriex 49460 grlimedgnedg 49502 zlidlring 49604 uzlidlring 49605 lcoop 49854 ldepsnlinc 49951 nnpw2p 50029 lines 50175 iscnrm3r 50393 |
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