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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 3580 | . . . 4 ⊢ ((𝐵 ∈ 𝐷 ∧ 𝜓) → ∃𝑦 ∈ 𝐷 𝜒) |
| 3 | 2 | anim2i 628 | . . 3 ⊢ ((𝐴 ∈ 𝐶 ∧ (𝐵 ∈ 𝐷 ∧ 𝜓)) → (𝐴 ∈ 𝐶 ∧ ∃𝑦 ∈ 𝐷 𝜒)) |
| 4 | 3 | 3impb 1131 | . 2 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷 ∧ 𝜓) → (𝐴 ∈ 𝐶 ∧ ∃𝑦 ∈ 𝐷 𝜒)) |
| 5 | rspc2v.1 | . . . 4 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜒)) | |
| 6 | 5 | rexbidv 3188 | . . 3 ⊢ (𝑥 = 𝐴 → (∃𝑦 ∈ 𝐷 𝜑 ↔ ∃𝑦 ∈ 𝐷 𝜒)) |
| 7 | 6 | rspcev 3580 | . 2 ⊢ ((𝐴 ∈ 𝐶 ∧ ∃𝑦 ∈ 𝐷 𝜒) → ∃𝑥 ∈ 𝐶 ∃𝑦 ∈ 𝐷 𝜑) |
| 8 | 4, 7 | syl 18 | 1 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷 ∧ 𝜓) → ∃𝑥 ∈ 𝐶 ∃𝑦 ∈ 𝐷 𝜑) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 400 ∧ w3a 1102 = wceq 1569 ∈ wcel 2142 ∃wrex 3088 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-ext 2734 |
| This proof depends on definitions: df-bi 210 df-an 401 df-3an 1104 df-tru 1572 df-ex 1809 df-sb 2096 df-clab 2741 df-cleq 2754 df-clel 2837 df-ral 3079 df-rex 3089 |
| This theorem is used by: 2rspcedvdw 3594 opelxp 5696 fprb 7192 f1prex 7282 nf1const 7302 rspceov 7461 erov 8810 ralxpmap 8892 2dom 9025 elfiun 9388 dffi3 9389 ixpiunwdom 9550 1re 11214 hashdmpropge2 14527 wrdl2exs2 14990 ello12r 15575 ello1d 15581 elo12r 15586 o1lo1 15595 addcn2 15652 mulcn2 15654 bezoutlem3 16605 bezout 16607 pythagtriplem18 16898 pczpre 16913 pcdiv 16918 4sqlem3 17016 4sqlem4 17018 4sqlem12 17022 vdwlem1 17047 vdwlem6 17052 vdwlem8 17054 vdwlem12 17058 vdwlem13 17059 0ram 17086 ramz2 17090 cat1lem 18159 sgrp2rid2ex 18995 pmtr3ncom 19551 psgnunilem1 19569 irredn0 20512 isnzr2 20626 hausnei2 23521 cnhaus 23522 dishaus 23550 ordthauslem 23551 txuni2 23733 xkoopn 23757 txopn 23770 txdis 23800 txdis1cn 23803 pthaus 23806 txhaus 23815 tx1stc 23818 xkohaus 23821 regr1lem 23907 qustgplem 24289 methaus 24688 met2ndci 24690 metnrmlem3 25030 elplyr 26369 aaliou2b 26515 aaliou3lem9 26524 2irrexpq 26907 2irrexpqALT 26976 2sqlem2 27593 2sqlem8 27601 2sqlem11 27604 2sqb 27607 2sqnn 27614 pntibnd 27768 madecut 28087 mulsproplem12 28331 precsexlem11 28421 eucliddivs 28580 elz12si 28677 zz12s 28679 remulscllem1 28704 legov 28865 iscgrad 29133 f1otrge 29232 axsegconlem1 29278 axsegcon 29288 axpaschlem 29301 axlowdimlem6 29308 axlowdim1 29320 axlowdim2 29321 axeuclidlem 29323 umgrvad2edg 29574 wwlksnwwlksnon 30275 upgr4cycl4dv4e 30547 3cyclfrgrrn1 30647 4cycl2vnunb 30652 br8d 32964 lt2addrd 33106 xlt2addrd 33115 xrnarchi 33513 txomap 34233 tpr2rico 34311 qqhval2 34381 elsx 34593 br2base 34668 dya2iocnrect 34680 connpconn 35735 satfv1fvfmla1 35923 br8 36256 br4 36258 brsegle 36608 hilbert1.1 36654 nn0prpwlem 36861 knoppndvlem21 37149 poimirlem1 38300 itg2addnclem3 38352 cntotbnd 38475 smprngopr 38731 3dim2 40270 llni2 40314 lvoli3 40379 lvoli2 40383 islinei 40542 psubspi2N 40550 elpaddri 40604 eldioph2lem1 43519 diophin 43531 fphpdo 43572 irrapxlem3 43579 irrapxlem4 43580 pellexlem6 43589 pell1234qrreccl 43609 pell1234qrmulcl 43610 pell1234qrdich 43616 pell1qr1 43626 pellqrexplicit 43632 rmxycomplete 43672 dgraalem 43900 tfsconcatrev 44103 clsk3nimkb 44794 fourierdlem64 46912 rspceaov 47962 modn0mul 48128 ichnreuop 48249 prelspr 48263 reuopreuprim 48303 6gbe 48564 7gbow 48565 8gbe 48566 9gbo 48567 11gbo 48568 smprngprmrng 49132 elbigo2r 49361 rrx2xpref1o 49526 inlinecirc02plem 49594 sepfsepc 49734 iscnrm3lem7 49745 |
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