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| Mirrors > Home > MPE Home > Th. List > 19.42v | Structured version Visualization version GIF version | ||
| Description: Version of 19.42 2248 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 1956 | . 2 ⊢ (∃𝑥(𝜓 ∧ 𝜑) ↔ (∃𝑥𝜓 ∧ 𝜑)) | |
| 2 | exancom 1868 | . 2 ⊢ (∃𝑥(𝜑 ∧ 𝜓) ↔ ∃𝑥(𝜓 ∧ 𝜑)) | |
| 3 | ancom 461 | . 2 ⊢ ((𝜑 ∧ ∃𝑥𝜓) ↔ (∃𝑥𝜓 ∧ 𝜑)) | |
| 4 | 1, 2, 3 | 3bitr4i 304 | 1 ⊢ (∃𝑥(𝜑 ∧ 𝜓) ↔ (𝜑 ∧ ∃𝑥𝜓)) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 207 ∧ wa 396 ∃wex 1786 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-ex 1787 |
| This theorem is referenced by: exdistr 1961 19.42vv 1964 19.42vvv 1966 4exdistr 1968 2sb5 2289 eeeanv 2358 eu6lem 2577 r3ex 3178 rexcom4a 3269 ceqsex2 3482 ceqsex2v 3483 reuind 3694 2reu5lem3 3698 sbccomlemOLD 3802 bm1.3iiOLD 5224 eqvinop 5427 copsexgw 5430 dfid2 5515 dmopabss 5860 dmopab3 5861 dmxp 5871 rnopabss 5897 rnopab3 5898 dmres 5964 ssrnres 6129 mptpreima 6189 resco 6201 mptfnf 6620 brprcneu 6817 brprcneuALT 6818 fndmin 6986 fliftf 7259 dfoprab2 7414 dmoprab 7459 dmoprabss 7460 fnoprabg 7479 uniuni 7705 zfrep6OLD 7897 opabex3d 7907 opabex3rd 7908 opabex3 7909 fsplit 8056 eroveu 8749 ensymfib 9108 rankuni 9778 aceq1 10030 dfac3 10034 kmlem14 10077 kmlem15 10078 axdc2lem 10361 1idpr 10943 ltexprlem1 10950 ltexprlem4 10953 xpcogend 14927 shftdm 15024 joindm 18330 meetdm 18344 toprntopon 22908 ntreq0 23060 cnextf 24049 dmcuts 27801 adjeu 31978 rexunirn 32579 fpwrelmapffslem 32824 mxidlnzrb 33563 tgoldbachgt 34847 bnj1019 34962 bnj1209 34978 bnj1033 35151 bnj1189 35191 satfdm 35597 dfiota3 36149 brimg 36163 funpartlem 36170 bj-eeanvw 37058 bj-snsetex 37316 bj-snglc 37322 bj-bm1.3ii 37417 bj-dfid2ALT 37418 bj-axreprepsep 37428 bj-restuni 37455 bj-xpcossxp 37549 bj-imdirco 37550 itg2addnc 38041 sbccom2lem 38491 eldmres 38644 rnxrn 38788 coss1cnvres 38874 nnoeomeqom 43757 rp-isfinite6 43962 undmrnresiss 44048 elintima 44097 pm11.58 44834 pm11.71 44841 2sbc5g 44860 iotasbc2 44864 ax6e2nd 45002 ax6e2ndVD 45351 ax6e2ndALT 45373 modelaxreplem3 45424 stoweidlem60 46503 coxp 49323 mofeu 49338 uobffth 49708 uobeqw 49709 elpglem3 50203 |
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