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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 3579 | . . . 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 3188 | . . 3 ⊢ (𝑥 = 𝐴 → (∃𝑦 ∈ 𝐷 𝜑 ↔ ∃𝑦 ∈ 𝐷 𝜒)) |
| 7 | 6 | rspcev 3579 | . 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 3088 |
| 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 2734 |
| 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 2741 df-cleq 2754 df-clel 2837 df-ral 3079 df-rex 3089 |
| This theorem is used by: 2rspcedvdw 3593 opelxp 5695 fprb 7195 f1prex 7288 nf1const 7308 rspceov 7465 erov 8817 ralxpmap 8906 2dom 9040 elfiun 9403 dffi3 9404 ixpiunwdom 9565 1re 11235 hashdmpropge2 14550 wrdl2exs2 15019 ello12r 15606 ello1d 15612 elo12r 15617 o1lo1 15626 addcn2 15683 mulcn2 15685 bezoutlem3 16635 bezout 16637 pythagtriplem18 16928 pczpre 16943 pcdiv 16948 4sqlem3 17046 4sqlem4 17048 4sqlem12 17052 vdwlem1 17077 vdwlem6 17082 vdwlem8 17084 vdwlem12 17088 vdwlem13 17089 0ram 17116 ramz2 17120 cat1lem 18189 sgrp2rid2ex 19040 pmtr3ncom 19603 psgnunilem1 19621 irredn0 20565 isnzr2 20679 hausnei2 23579 cnhaus 23580 dishaus 23608 ordthauslem 23609 txuni2 23792 xkoopn 23816 txopn 23829 txdis 23859 txdis1cn 23862 pthaus 23865 txhaus 23874 tx1stc 23877 xkohaus 23880 regr1lem 23966 qustgplem 24348 methaus 24747 met2ndci 24749 metnrmlem3 25089 elplyr 26428 aaliou2b 26574 aaliou3lem9 26583 2irrexpq 26966 2irrexpqALT 27035 2sqlem2 27652 2sqlem8 27660 2sqlem11 27663 2sqb 27666 2sqnn 27673 pntibnd 27827 madecut 28146 mulsproplem12 28390 precsexlem11 28480 eucliddivs 28639 elz12si 28736 zz12s 28738 remulscllem1 28763 legov 28925 iscgrad 29195 f1otrge 29314 axsegconlem1 29360 axsegcon 29370 axpaschlem 29383 axlowdimlem6 29390 axlowdim1 29402 axlowdim2 29403 axeuclidlem 29405 umgrvad2edg 29659 wwlksnwwlksnon 30369 upgr4cycl4dv4e 30651 3cyclfrgrrn1 30751 4cycl2vnunb 30756 br8d 33068 lt2addrd 33208 xlt2addrd 33217 xrnarchi 33611 txomap 34331 tpr2rico 34409 qqhval2 34479 elsx 34692 br2base 34767 dya2iocnrect 34779 connpconn 35801 satfv1fvfmla1 35989 br8 36322 br4 36324 brsegle 36675 hilbert1.1 36721 nn0prpwlem 36928 knoppndvlem21 37216 poimirlem1 38357 itg2addnclem3 38409 cntotbnd 38533 smprngopr 38789 3dim2 40328 llni2 40372 lvoli3 40437 lvoli2 40441 islinei 40600 psubspi2N 40608 elpaddri 40662 eldioph2lem1 43592 diophin 43604 fphpdo 43645 irrapxlem3 43652 irrapxlem4 43653 pellexlem6 43662 pell1234qrreccl 43682 pell1234qrmulcl 43683 pell1234qrdich 43689 pell1qr1 43699 pellqrexplicit 43705 rmxycomplete 43745 dgraalem 43973 tfsconcatrev 44176 clsk3nimkb 44867 fourierdlem64 46985 rspceaov 48072 modn0mul 48238 ichnreuop 48359 prelspr 48373 reuopreuprim 48413 6gbe 48674 7gbow 48675 8gbe 48676 9gbo 48677 11gbo 48678 smprngprmrng 49241 elbigo2r 49470 rrx2xpref1o 49635 inlinecirc02plem 49703 sepfsepc 49841 iscnrm3lem7 49852 |
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