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| Mirrors > Home > MPE Home > Th. List > 19.42v | Structured version Visualization version GIF version | ||
| Description: Version of 19.42 2271 with a disjoint variable condition requiring fewer axioms. (Contributed by NM, 21-Jun-1993.) |
| Ref | Expression |
|---|---|
| 19.42v | ⊢ (∃𝑥(𝜑 ∧ 𝜓) ↔ (𝜑 ∧ ∃𝑥𝜓)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 19.41v 1969 | . 2 ⊢ (∃𝑥(𝜓 ∧ 𝜑) ↔ (∃𝑥𝜓 ∧ 𝜑)) | |
| 2 | exancom 1881 | . 2 ⊢ (∃𝑥(𝜑 ∧ 𝜓) ↔ ∃𝑥(𝜓 ∧ 𝜑)) | |
| 3 | ancom 464 | . 2 ⊢ ((𝜑 ∧ ∃𝑥𝜓) ↔ (∃𝑥𝜓 ∧ 𝜑)) | |
| 4 | 1, 2, 3 | 3bitr4i 305 | 1 ⊢ (∃𝑥(𝜑 ∧ 𝜓) ↔ (𝜑 ∧ ∃𝑥𝜓)) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 208 ∧ wa 399 ∃wex 1799 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1815 ax-4 1829 ax-5 1930 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-ex 1800 |
| This theorem is referenced by: exdistr 1974 19.42vv 1977 19.42vvv 1979 4exdistr 1981 2sb5 2312 eeeanv 2381 eu6lem 2600 r3ex 3201 rexcom4a 3292 ceqsex2 3504 ceqsex2v 3505 reuind 3716 2reu5lem3 3720 sbccomlemOLD 3823 bm1.3iiOLD 5252 eqvinop 5455 copsexgw 5458 dfid2 5544 dmopabss 5894 dmopab3 5895 dmxp 5905 rnopabss 5931 rnopab3 5932 dmres 5998 ssrnres 6164 mptpreima 6225 resco 6237 mptfnf 6656 brprcneu 6857 brprcneuALT 6858 fndmin 7026 fliftf 7299 dfoprab2 7454 dmoprab 7499 dmoprabss 7500 fnoprabg 7519 uniuni 7745 zfrep6OLD 7936 opabex3d 7946 opabex3rd 7947 opabex3 7948 fsplit 8096 eroveu 8794 ensymfib 9152 rankuni 9821 aceq1 10073 dfac3 10077 kmlem14 10120 kmlem15 10121 axdc2lem 10405 1idpr 10987 ltexprlem1 10994 ltexprlem4 10997 xpcogend 14987 shftdm 15084 joindm 18405 meetdm 18419 toprntopon 22985 ntreq0 23137 cnextf 24126 dmcuts 27884 adjeu 32092 rexunirn 32691 fpwrelmapffslem 32934 mxidlnzrb 33668 tgoldbachgt 34957 bnj1019 35075 bnj1209 35091 bnj1033 35264 bnj1189 35304 vonf1oonfo 35458 satfdm 35719 dfiota3 36271 brimg 36285 funpartlem 36292 bj-eeanvw 37190 bj-snsetex 37448 bj-snglc 37454 bj-bm1.3ii 37549 bj-dfid2ALT 37550 bj-axreprepsep 37560 bj-restuni 37587 bj-xpcossxp 37681 bj-imdirco 37682 itg2addnc 38173 sbccom2lem 38623 eldmres 38776 rnxrn 38920 coss1cnvres 39006 nnoeomeqom 43889 rp-isfinite6 44094 undmrnresiss 44180 elintima 44229 pm11.58 44966 pm11.71 44973 2sbc5g 44992 iotasbc2 44996 ax6e2nd 45134 ax6e2ndVD 45483 ax6e2ndALT 45505 modelaxreplem3 45556 stoweidlem60 46634 coxp 49454 mofeu 49469 uobffth 49839 uobeqw 49840 elpglem3 50334 |
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