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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.1 | . . 3 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜒)) | |
| 2 | 1 | rexbidv 3190 | . 2 ⊢ (𝑥 = 𝐴 → (∃𝑦 ∈ 𝐷 𝜑 ↔ ∃𝑦 ∈ 𝐷 𝜒)) |
| 3 | simp1 1154 | . 2 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷 ∧ 𝜓) → 𝐴 ∈ 𝐶) | |
| 4 | rspc2v.2 | . . . 4 ⊢ (𝑦 = 𝐵 → (𝜒 ↔ 𝜓)) | |
| 5 | 4 | rspcev 3580 | . . 3 ⊢ ((𝐵 ∈ 𝐷 ∧ 𝜓) → ∃𝑦 ∈ 𝐷 𝜒) |
| 6 | 5 | 3adant1 1148 | . 2 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷 ∧ 𝜓) → ∃𝑦 ∈ 𝐷 𝜒) |
| 7 | 2, 3, 6 | rspcedvdw 3583 | 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 ∧ w3a 1103 = 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-3an 1105 df-tru 1573 df-ex 1813 df-sb 2102 df-clab 2742 df-cleq 2755 df-clel 2839 df-ral 3081 df-rex 3091 |
| This theorem is used by: 2rspcedvdw 3593 opelxp 5691 fprb 7222 f1prex 7315 nf1const 7335 rspceov 7492 erov 8863 ralxpmap 8952 2dom 9086 elfiun 9449 dffi3 9450 ixpiunwdom 9611 1re 11335 hashdmpropge2 14655 wrdl2exs2 15126 ello12r 15713 ello1d 15719 elo12r 15724 o1lo1 15733 addcn2 15790 mulcn2 15792 bezoutlem3 16743 bezout 16745 pythagtriplem18 17039 pczpre 17054 pcdiv 17059 4sqlem3 17157 4sqlem4 17159 4sqlem12 17163 vdwlem1 17188 vdwlem6 17193 vdwlem8 17195 vdwlem12 17199 vdwlem13 17200 0ram 17227 ramz2 17231 cat1lem 18300 sgrp2rid2ex 19155 pmtr3ncom 19719 psgnunilem1 19737 irredn0 20683 isnzr2 20798 hausnei2 23701 cnhaus 23702 dishaus 23730 ordthauslem 23731 txuni2 23914 xkoopn 23938 txopn 23951 txdis 23981 txdis1cn 23984 pthaus 23987 txhaus 23996 tx1stc 23999 xkohaus 24002 regr1lem 24088 qustgplem 24470 methaus 24869 met2ndci 24871 metnrmlem3 25211 elplyr 26549 aaliou2b 26698 aaliou3lem9 26707 2irrexpq 27089 2irrexpqALT 27158 2sqlem2 27775 2sqlem8 27783 2sqlem11 27786 2sqb 27789 2sqnn 27796 pntibnd 27950 madecut 28299 mulsproplem12 28543 precsexlem11 28633 eucliddivs 28792 elz12si 28889 zz12s 28891 remulscllem1 28916 legov 29078 iscgrad 29348 f1otrge 29479 axsegconlem1 29525 axsegcon 29535 axpaschlem 29548 axlowdimlem6 29555 axlowdim1 29567 axlowdim2 29568 axeuclidlem 29570 umgrvad2edg 29824 wwlksnwwlksnon 30534 upgr4cycl4dv4e 30816 3cyclfrgrrn1 30916 4cycl2vnunb 30921 br8d 33274 lt2addrd 33412 xlt2addrd 33421 xrnarchi 33815 txomap 34536 tpr2rico 34614 qqhval2 34684 elsx 34897 br2base 34971 dya2iocnrect 34983 connpconn 36167 satfv1fvfmla1 36355 br8 36699 br4 36701 brsegle 37051 hilbert1.1 37097 nn0prpwlem 37288 knoppndvlem21 37576 poimirlem1 38731 itg2addnclem3 38783 cntotbnd 38922 smprngopr 39178 3dim2 40717 llni2 40761 lvoli3 40826 lvoli2 40830 islinei 40989 psubspi2N 40997 elpaddri 41051 eldioph2lem1 43964 diophin 43976 fphpdo 44017 irrapxlem3 44024 irrapxlem4 44025 pellexlem6 44034 pell1234qrreccl 44054 pell1234qrmulcl 44055 pell1234qrdich 44061 pell1qr1 44071 pellqrexplicit 44077 rmxycomplete 44117 dgraalem 44339 tfsconcatrev 44542 clsk3nimkb 45232 fourierdlem64 47385 rspceaov 48472 modn0mul 48638 ichnreuop 48759 prelspr 48773 reuopreuprim 48813 6gbe 49074 7gbow 49075 8gbe 49076 9gbo 49077 11gbo 49078 smprngprmrng 49641 elbigo2r 49870 inlinecirc02plem 50103 sepfsepc 50247 iscnrm3lem7 50258 |
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