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Mirrors > Home > MPE Home > Th. List > rspc2ev | Structured version Visualization version GIF version |
Description: 2-variable restricted existential specialization, using implicit substitution. (Contributed by NM, 16-Oct-1999.) |
Ref | Expression |
---|---|
rspc2v.1 | ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜒)) |
rspc2v.2 | ⊢ (𝑦 = 𝐵 → (𝜒 ↔ 𝜓)) |
Ref | Expression |
---|---|
rspc2ev | ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷 ∧ 𝜓) → ∃𝑥 ∈ 𝐶 ∃𝑦 ∈ 𝐷 𝜑) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | rspc2v.2 | . . . . 5 ⊢ (𝑦 = 𝐵 → (𝜒 ↔ 𝜓)) | |
2 | 1 | rspcev 3620 | . . . 4 ⊢ ((𝐵 ∈ 𝐷 ∧ 𝜓) → ∃𝑦 ∈ 𝐷 𝜒) |
3 | 2 | anim2i 618 | . . 3 ⊢ ((𝐴 ∈ 𝐶 ∧ (𝐵 ∈ 𝐷 ∧ 𝜓)) → (𝐴 ∈ 𝐶 ∧ ∃𝑦 ∈ 𝐷 𝜒)) |
4 | 3 | 3impb 1110 | . 2 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷 ∧ 𝜓) → (𝐴 ∈ 𝐶 ∧ ∃𝑦 ∈ 𝐷 𝜒)) |
5 | rspc2v.1 | . . . 4 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜒)) | |
6 | 5 | rexbidv 3296 | . . 3 ⊢ (𝑥 = 𝐴 → (∃𝑦 ∈ 𝐷 𝜑 ↔ ∃𝑦 ∈ 𝐷 𝜒)) |
7 | 6 | rspcev 3620 | . 2 ⊢ ((𝐴 ∈ 𝐶 ∧ ∃𝑦 ∈ 𝐷 𝜒) → ∃𝑥 ∈ 𝐶 ∃𝑦 ∈ 𝐷 𝜑) |
8 | 4, 7 | syl 17 | 1 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷 ∧ 𝜓) → ∃𝑥 ∈ 𝐶 ∃𝑦 ∈ 𝐷 𝜑) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 208 ∧ wa 398 ∧ w3a 1082 = wceq 1536 ∈ wcel 2113 ∃wrex 3138 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1969 ax-7 2014 ax-8 2115 ax-9 2123 ax-ext 2792 |
This theorem depends on definitions: df-bi 209 df-an 399 df-3an 1084 df-ex 1780 df-cleq 2813 df-clel 2892 df-ral 3142 df-rex 3143 |
This theorem is referenced by: rspc3ev 3634 opelxp 5584 fprb 6949 f1prex 7033 nf1const 7052 rspceov 7196 erov 8387 ralxpmap 8453 2dom 8575 elfiun 8887 dffi3 8888 ixpiunwdom 9048 1re 10634 hashdmpropge2 13838 wrdl2exs2 14303 ello12r 14869 ello1d 14875 elo12r 14880 o1lo1 14889 addcn2 14945 mulcn2 14947 bezoutlem3 15884 bezout 15886 pythagtriplem18 16164 pczpre 16179 pcdiv 16184 4sqlem3 16281 4sqlem4 16283 4sqlem12 16287 vdwlem1 16312 vdwlem6 16317 vdwlem8 16319 vdwlem12 16323 vdwlem13 16324 0ram 16351 ramz2 16355 sgrp2rid2ex 18087 pmtr3ncom 18598 psgnunilem1 18616 irredn0 19448 isnzr2 20031 hausnei2 21956 cnhaus 21957 dishaus 21985 ordthauslem 21986 txuni2 22168 xkoopn 22192 txopn 22205 txdis 22235 txdis1cn 22238 pthaus 22241 txhaus 22250 tx1stc 22253 xkohaus 22256 regr1lem 22342 qustgplem 22724 methaus 23125 met2ndci 23127 metnrmlem3 23464 elplyr 24789 aaliou2b 24928 aaliou3lem9 24937 2irrexpq 25311 2irrexpqALT 25376 2sqlem2 25992 2sqlem8 26000 2sqlem11 26003 2sqb 26006 2sqnn0 26012 2sqnn 26013 pntibnd 26167 legov 26369 iscgrad 26595 f1otrge 26656 axsegconlem1 26701 axsegcon 26711 axpaschlem 26724 axlowdimlem6 26731 axlowdim1 26743 axlowdim2 26744 axeuclidlem 26746 umgrvad2edg 26993 wwlksnwwlksnon 27692 upgr4cycl4dv4e 27962 3cyclfrgrrn1 28062 4cycl2vnunb 28067 br8d 30361 lt2addrd 30475 xlt2addrd 30482 xrnarchi 30834 txomap 31122 tpr2rico 31176 qqhval2 31244 elsx 31474 isanmbfm 31535 br2base 31548 dya2iocnrect 31560 connpconn 32503 satfv1fvfmla1 32691 br8 33013 br4 33015 brsegle 33590 hilbert1.1 33636 nn0prpwlem 33691 knoppndvlem21 33892 poimirlem1 34928 itg2addnclem3 34980 cntotbnd 35107 smprngopr 35363 3dim2 36637 llni2 36681 lvoli3 36746 lvoli2 36750 islinei 36909 psubspi2N 36917 elpaddri 36971 eldioph2lem1 39433 diophin 39445 fphpdo 39490 irrapxlem3 39497 irrapxlem4 39498 pellexlem6 39507 pell1234qrreccl 39527 pell1234qrmulcl 39528 pell1234qrdich 39534 pell1qr1 39544 pellqrexplicit 39550 rmxycomplete 39590 dgraalem 39821 clsk3nimkb 40464 fourierdlem64 42529 rspceaov 43470 ichnreuop 43708 prelspr 43722 reuopreuprim 43762 6gbe 44010 7gbow 44011 8gbe 44012 9gbo 44013 11gbo 44014 modn0mul 44654 elbigo2r 44687 rrx2xpref1o 44779 inlinecirc02plem 44847 |
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