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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 3282 | . . . 4 ⊢ ((𝐵 ∈ 𝐷 ∧ 𝜓) → ∃𝑦 ∈ 𝐷 𝜒) |
3 | 2 | anim2i 591 | . . 3 ⊢ ((𝐴 ∈ 𝐶 ∧ (𝐵 ∈ 𝐷 ∧ 𝜓)) → (𝐴 ∈ 𝐶 ∧ ∃𝑦 ∈ 𝐷 𝜒)) |
4 | 3 | 3impb 1252 | . 2 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷 ∧ 𝜓) → (𝐴 ∈ 𝐶 ∧ ∃𝑦 ∈ 𝐷 𝜒)) |
5 | rspc2v.1 | . . . 4 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜒)) | |
6 | 5 | rexbidv 3034 | . . 3 ⊢ (𝑥 = 𝐴 → (∃𝑦 ∈ 𝐷 𝜑 ↔ ∃𝑦 ∈ 𝐷 𝜒)) |
7 | 6 | rspcev 3282 | . 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 195 ∧ wa 383 ∧ w3a 1031 = wceq 1475 ∈ wcel 1977 ∃wrex 2897 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-rex 2902 df-v 3175 |
This theorem is referenced by: rspc3ev 3297 opelxp 5070 f1prex 6439 rspceov 6590 erov 7731 ralxpmap 7793 2dom 7915 elfiun 8219 dffi3 8220 ixpiunwdom 8379 1re 9918 wrdl2exs2 13538 ello12r 14096 ello1d 14102 elo12r 14107 o1lo1 14116 addcn2 14172 mulcn2 14174 bezoutlem3 15096 bezout 15098 pythagtriplem18 15375 pczpre 15390 pcdiv 15395 4sqlem3 15492 4sqlem4 15494 4sqlem12 15498 vdwlem1 15523 vdwlem6 15528 vdwlem8 15530 vdwlem12 15534 vdwlem13 15535 0ram 15562 ramz2 15566 sgrp2rid2ex 17237 pmtr3ncom 17718 psgnunilem1 17736 irredn0 18526 isnzr2 19084 hausnei2 20967 cnhaus 20968 dishaus 20996 ordthauslem 20997 txuni2 21178 xkoopn 21202 txopn 21215 txdis 21245 txdis1cn 21248 pthaus 21251 txhaus 21260 tx1stc 21263 xkohaus 21266 regr1lem 21352 qustgplem 21734 methaus 22135 met2ndci 22137 metnrmlem3 22472 elplyr 23761 aaliou2b 23900 aaliou3lem9 23909 2sqlem2 24943 2sqlem8 24951 2sqlem11 24954 2sqb 24957 pntibnd 25082 legov 25280 iscgrad 25503 f1otrge 25552 axsegconlem1 25597 axsegcon 25607 axpaschlem 25620 axlowdimlem6 25627 axlowdim1 25639 axlowdim2 25640 axeuclidlem 25642 structgrssvtxlem 25700 upgredg 25811 el2wlksotot 26409 3cyclfrgrarn1 26539 4cycl2vnunb 26544 br8d 28802 lt2addrd 28903 xlt2addrd 28913 xrnarchi 29069 txomap 29229 tpr2rico 29286 qqhval2 29354 elsx 29584 isanmbfm 29645 br2base 29658 dya2iocnrect 29670 conpcon 30471 br8 30899 br4 30901 fprb 30916 brsegle 31385 hilbert1.1 31431 nn0prpwlem 31487 knoppndvlem21 31693 poimirlem1 32580 itg2addnclem3 32633 cntotbnd 32765 smprngopr 33021 3dim2 33772 llni2 33816 lvoli3 33881 lvoli2 33885 islinei 34044 psubspi2N 34052 elpaddri 34106 eldioph2lem1 36341 diophin 36354 fphpdo 36399 irrapxlem3 36406 irrapxlem4 36407 pellexlem6 36416 pell1234qrreccl 36436 pell1234qrmulcl 36437 pell1234qrdich 36443 pell1qr1 36453 pellqrexplicit 36459 rmxycomplete 36500 dgraalem 36734 clsk3nimkb 37358 fourierdlem64 39063 rspceaov 39926 6gbe 40193 7gbo 40194 8gbe 40195 9gboa 40196 11gboa 40197 umgrvad2edg 40440 wwlksnwwlksnon 41121 upgr4cycl4dv4e 41352 3cyclfrgrrn1 41455 4cycl2vnunb-av 41460 modn0mul 42109 elbigo2r 42145 |
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