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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 3576 | . . . 4 ⊢ ((𝐵 ∈ 𝐷 ∧ 𝜓) → ∃𝑦 ∈ 𝐷 𝜒) |
| 3 | 2 | anim2i 629 | . . 3 ⊢ ((𝐴 ∈ 𝐶 ∧ (𝐵 ∈ 𝐷 ∧ 𝜓)) → (𝐴 ∈ 𝐶 ∧ ∃𝑦 ∈ 𝐷 𝜒)) |
| 4 | 3 | 3impb 1132 | . 2 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷 ∧ 𝜓) → (𝐴 ∈ 𝐶 ∧ ∃𝑦 ∈ 𝐷 𝜒)) |
| 5 | rspc2v.1 | . . . 4 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜒)) | |
| 6 | 5 | rexbidv 3186 | . . 3 ⊢ (𝑥 = 𝐴 → (∃𝑦 ∈ 𝐷 𝜑 ↔ ∃𝑦 ∈ 𝐷 𝜒)) |
| 7 | 6 | rspcev 3576 | . 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 401 ∧ w3a 1103 = wceq 1570 ∈ wcel 2145 ∃wrex 3086 |
| 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 2147 ax-9 2155 ax-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-3an 1105 df-tru 1573 df-ex 1813 df-sb 2100 df-clab 2739 df-cleq 2752 df-clel 2835 df-ral 3077 df-rex 3087 |
| This theorem is used by: 2rspcedvdw 3589 opelxp 5683 fprb 7187 f1prex 7280 nf1const 7300 rspceov 7457 erov 8813 ralxpmap 8902 2dom 9036 elfiun 9400 dffi3 9401 ixpiunwdom 9562 1re 11279 hashdmpropge2 14595 wrdl2exs2 15064 ello12r 15651 ello1d 15657 elo12r 15662 o1lo1 15671 addcn2 15728 mulcn2 15730 bezoutlem3 16678 bezout 16680 pythagtriplem18 16971 pczpre 16986 pcdiv 16991 4sqlem3 17089 4sqlem4 17091 4sqlem12 17095 vdwlem1 17120 vdwlem6 17125 vdwlem8 17127 vdwlem12 17131 vdwlem13 17132 0ram 17159 ramz2 17163 cat1lem 18232 sgrp2rid2ex 19087 pmtr3ncom 19650 psgnunilem1 19668 irredn0 20614 isnzr2 20729 hausnei2 23632 cnhaus 23633 dishaus 23661 ordthauslem 23662 txuni2 23845 xkoopn 23869 txopn 23882 txdis 23912 txdis1cn 23915 pthaus 23918 txhaus 23927 tx1stc 23930 xkohaus 23933 regr1lem 24019 qustgplem 24401 methaus 24800 met2ndci 24802 metnrmlem3 25142 elplyr 26480 aaliou2b 26631 aaliou3lem9 26640 2irrexpq 27022 2irrexpqALT 27091 2sqlem2 27708 2sqlem8 27716 2sqlem11 27719 2sqb 27722 2sqnn 27729 pntibnd 27883 madecut 28202 mulsproplem12 28446 precsexlem11 28536 eucliddivs 28695 elz12si 28792 zz12s 28794 remulscllem1 28819 legov 28981 iscgrad 29251 f1otrge 29382 axsegconlem1 29428 axsegcon 29438 axpaschlem 29451 axlowdimlem6 29458 axlowdim1 29470 axlowdim2 29471 axeuclidlem 29473 umgrvad2edg 29727 wwlksnwwlksnon 30437 upgr4cycl4dv4e 30719 3cyclfrgrrn1 30819 4cycl2vnunb 30824 br8d 33135 lt2addrd 33275 xlt2addrd 33284 xrnarchi 33678 txomap 34399 tpr2rico 34477 qqhval2 34547 elsx 34760 br2base 34835 dya2iocnrect 34847 connpconn 35921 satfv1fvfmla1 36109 br8 36442 br4 36444 brsegle 36795 hilbert1.1 36841 nn0prpwlem 37032 knoppndvlem21 37320 poimirlem1 38459 itg2addnclem3 38511 cntotbnd 38650 smprngopr 38906 3dim2 40445 llni2 40489 lvoli3 40554 lvoli2 40558 islinei 40717 psubspi2N 40725 elpaddri 40779 eldioph2lem1 43709 diophin 43721 fphpdo 43762 irrapxlem3 43769 irrapxlem4 43770 pellexlem6 43779 pell1234qrreccl 43799 pell1234qrmulcl 43800 pell1234qrdich 43806 pell1qr1 43816 pellqrexplicit 43822 rmxycomplete 43862 dgraalem 44090 tfsconcatrev 44293 clsk3nimkb 44984 fourierdlem64 47102 rspceaov 48189 modn0mul 48355 ichnreuop 48476 prelspr 48490 reuopreuprim 48530 6gbe 48791 7gbow 48792 8gbe 48793 9gbo 48794 11gbo 48795 smprngprmrng 49358 elbigo2r 49587 rrx2xpref1o 49752 inlinecirc02plem 49820 sepfsepc 49958 iscnrm3lem7 49969 |
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