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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 2179, ax-11 2195, 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 2851 | . . 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 3187 | 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 2146 ∃wrex 3091 |
| 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 2148 ax-9 2156 ax-ext 2737 |
| This proof depends on definitions: df-bi 210 df-an 402 df-ex 1813 df-cleq 2757 df-clel 2840 df-rex 3092 |
| This theorem is used by: frd 5620 supeq123d 9417 fpwwe2lem12 10642 vdwpc 17062 ramval 17090 mreexexlemd 17722 iscat 17750 iscatd 17751 catidex 17752 idressidex 18764 gsumval2a 18775 ismnddef 18826 mndpropd 18852 isgrp 19050 isgrpd2e 19066 cayleyth 19529 psgnfval 19614 iscyg 19993 ltbval 22244 opsrval 22247 scmatval 22711 pmatcollpw3fi1lem2 22994 pmatcollpw3fi1 22995 neiptopnei 23339 is1stc 23648 2ndc1stc 23658 2ndcsep 23667 islly 23676 isnlly 23677 ucnval 24484 imasdsf1olem 24581 met2ndc 24731 evthicc 25669 elmade2 28102 addsval 28206 mulsval 28353 istrkgb 28775 istrkge 28777 istrkgld 28779 legval 28904 ishpg 29092 plngval 29110 lnssplng 29125 iscgra 29171 isinag 29210 isleag 29219 nbgrval 29744 nb3grprlem2 29789 1loopgrvd0 29912 erclwwlkeq 30436 eucrctshift 30665 isplig 30899 nmoofval 31185 erlval 33642 idomsubr 33694 elrsp 33750 1arithidom 33891 dfufd2lem 33903 fldextrspunlsp 34128 extdgfialglem1 34146 constrsuc 34192 reprsuc 35067 istrkg2d 35118 iscvm 35788 cvmlift2lem13 35844 br8 36285 br6 36286 br4 36287 brsegle 36637 hilbert1.1 36683 pibp21 38118 poimirlem26 38354 poimirlem28 38356 poimirlem29 38357 cover2g 38425 isexid 38556 isrngo 38606 isrngod 38607 isgrpda 38664 lshpset 39810 cvrfval 40100 isatl 40131 ishlat1 40184 llnset 40337 lplnset 40361 lvolset 40404 lineset 40570 lcfl7N 42333 lcfrlem8 42381 lcfrlem9 42382 lcf1o 42383 hvmapffval 42590 hvmapfval 42591 hvmapval 42592 prjspval 43393 mzpcompact2lem 43540 eldioph 43547 aomclem8 43846 tfsconcatun 44122 clsk1independent 44830 ovnval 47313 sprval 48286 nnsum3primes4 48611 nnsum3primesprm 48613 nnsum3primesgbe 48615 wtgoldbnnsum4prm 48625 bgoldbnnsum3prm 48627 clnbgrval 48645 gpg3kgrtriex 48912 grlimedgnedg 48954 zlidlring 49056 uzlidlring 49057 lcoop 49248 ldepsnlinc 49345 nnpw2p 49423 lines 49568 iscnrm3r 49783 |
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