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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 3613 | . . . 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 1116 | . 2 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷 ∧ 𝜓) → (𝐴 ∈ 𝐶 ∧ ∃𝑦 ∈ 𝐷 𝜒)) |
5 | rspc2v.1 | . . . 4 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜒)) | |
6 | 5 | rexbidv 3179 | . . 3 ⊢ (𝑥 = 𝐴 → (∃𝑦 ∈ 𝐷 𝜑 ↔ ∃𝑦 ∈ 𝐷 𝜒)) |
7 | 6 | rspcev 3613 | . 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 205 ∧ wa 397 ∧ w3a 1088 = wceq 1542 ∈ wcel 2107 ∃wrex 3071 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-ext 2704 |
This theorem depends on definitions: df-bi 206 df-an 398 df-3an 1090 df-tru 1545 df-ex 1783 df-sb 2069 df-clab 2711 df-cleq 2725 df-clel 2811 df-ral 3063 df-rex 3072 |
This theorem is referenced by: 2rspcedvdw 3625 rspc3ev 3628 opelxp 5712 fprb 7192 f1prex 7279 nf1const 7299 rspceov 7453 erov 8805 ralxpmap 8887 2dom 9027 elfiun 9422 dffi3 9423 ixpiunwdom 9582 1re 11211 hashdmpropge2 14441 wrdl2exs2 14894 ello12r 15458 ello1d 15464 elo12r 15469 o1lo1 15478 addcn2 15535 mulcn2 15537 bezoutlem3 16480 bezout 16482 pythagtriplem18 16762 pczpre 16777 pcdiv 16782 4sqlem3 16880 4sqlem4 16882 4sqlem12 16886 vdwlem1 16911 vdwlem6 16916 vdwlem8 16918 vdwlem12 16922 vdwlem13 16923 0ram 16950 ramz2 16954 cat1lem 18043 sgrp2rid2ex 18805 pmtr3ncom 19338 psgnunilem1 19356 irredn0 20230 isnzr2 20290 hausnei2 22849 cnhaus 22850 dishaus 22878 ordthauslem 22879 txuni2 23061 xkoopn 23085 txopn 23098 txdis 23128 txdis1cn 23131 pthaus 23134 txhaus 23143 tx1stc 23146 xkohaus 23149 regr1lem 23235 qustgplem 23617 methaus 24021 met2ndci 24023 metnrmlem3 24369 elplyr 25707 aaliou2b 25846 aaliou3lem9 25855 2irrexpq 26230 2irrexpqALT 26295 2sqlem2 26911 2sqlem8 26919 2sqlem11 26922 2sqb 26925 2sqnn0 26931 2sqnn 26932 pntibnd 27086 madecut 27367 mulsproplem12 27573 precsexlem11 27653 legov 27826 iscgrad 28052 f1otrge 28113 axsegconlem1 28165 axsegcon 28175 axpaschlem 28188 axlowdimlem6 28195 axlowdim1 28207 axlowdim2 28208 axeuclidlem 28210 umgrvad2edg 28460 wwlksnwwlksnon 29159 upgr4cycl4dv4e 29428 3cyclfrgrrn1 29528 4cycl2vnunb 29533 br8d 31827 lt2addrd 31952 xlt2addrd 31959 xrnarchi 32318 txomap 32803 tpr2rico 32881 qqhval2 32951 elsx 33181 br2base 33257 dya2iocnrect 33269 connpconn 34215 satfv1fvfmla1 34403 br8 34715 br4 34717 brsegle 35069 hilbert1.1 35115 nn0prpwlem 35196 knoppndvlem21 35397 poimirlem1 36478 itg2addnclem3 36530 cntotbnd 36653 smprngopr 36909 3dim2 38328 llni2 38372 lvoli3 38437 lvoli2 38441 islinei 38600 psubspi2N 38608 elpaddri 38662 eldioph2lem1 41484 diophin 41496 fphpdo 41541 irrapxlem3 41548 irrapxlem4 41549 pellexlem6 41558 pell1234qrreccl 41578 pell1234qrmulcl 41579 pell1234qrdich 41585 pell1qr1 41595 pellqrexplicit 41601 rmxycomplete 41642 dgraalem 41873 tfsconcatrev 42084 clsk3nimkb 42777 fourierdlem64 44873 rspceaov 45892 ichnreuop 46127 prelspr 46141 reuopreuprim 46181 6gbe 46426 7gbow 46427 8gbe 46428 9gbo 46429 11gbo 46430 modn0mul 47160 elbigo2r 47193 rrx2xpref1o 47358 inlinecirc02plem 47426 sepfsepc 47514 iscnrm3lem7 47526 |
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