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| Mirrors > Home > MPE Home > Th. List > nfre1 | Structured version Visualization version GIF version | ||
| Description: The setvar 𝑥 is not free in ∃𝑥 ∈ 𝐴𝜑. (Contributed by NM, 19-Mar-1997.) (Revised by Mario Carneiro, 7-Oct-2016.) |
| Ref | Expression |
|---|---|
| nfre1 | ⊢ Ⅎ𝑥∃𝑥 ∈ 𝐴 𝜑 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-rex 3092 | . 2 ⊢ (∃𝑥 ∈ 𝐴 𝜑 ↔ ∃𝑥(𝑥 ∈ 𝐴 ∧ 𝜑)) | |
| 2 | nfe1 2188 | . 2 ⊢ Ⅎ𝑥∃𝑥(𝑥 ∈ 𝐴 ∧ 𝜑) | |
| 3 | 1, 2 | nfxfr 1886 | 1 ⊢ Ⅎ𝑥∃𝑥 ∈ 𝐴 𝜑 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∧ wa 401 ∃wex 1812 Ⅎwnf 1816 ∈ wcel 2146 ∃wrex 3091 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-10 2179 |
| This proof depends on definitions: df-bi 210 df-ex 1813 df-nf 1817 df-rex 3092 |
| This theorem is used by: 2rmorex 3719 2reurex 3725 reuan 3851 2reu4lem 4486 nfiu1 4994 reusv2lem3 5373 fvelimad 6952 fsnex 7290 eusvobj2 7411 fiun 7946 f1iun 7947 zfregclOLD 9564 scott0b 9873 scott0OLD 9874 ac6c4 10480 lbzbi 12976 mreiincl 17670 lss1d 21134 neiptopnei 23339 neitr 23387 utopsnneiplem 24455 cfilucfil 24767 2sqmo 27652 nosupbnd2 27931 noinfbnd2 27946 mpteleeOLD 29300 isch3 31664 atom1d 32776 opreu2reuALT 32894 iinabrex 32985 xrofsup 33182 locfinreflem 34294 esumc 34505 esumrnmpt2 34522 hasheuni 34539 esumcvg 34540 esumcvgre 34545 voliune 34684 volfiniune 34685 ddemeas 34691 eulerpartlemgvv 34831 bnj900 35382 bnj1189 35462 bnj1204 35465 bnj1398 35487 bnj1444 35496 bnj1445 35497 bnj1446 35498 bnj1447 35499 bnj1467 35507 bnj1518 35517 bnj1519 35518 iooelexlt 38065 fvineqsneq 38115 ptrest 38327 poimirlem26 38354 indexa 38442 filbcmb 38449 sdclem1 38452 heibor1 38519 dihglblem5 42130 unielss 44003 oaun3lem1 44159 suprnmpt 45950 disjinfi 45968 upbdrech 46082 ssfiunibd 46086 infxrunb2 46141 supxrunb3 46172 iccshift 46292 iooshift 46296 islpcn 46411 limsupre 46413 limclner 46423 limsupre3uzlem 46507 climuzlem 46515 xlimmnfv 46606 xlimpnfv 46610 itgperiod 46753 stoweidlem53 46825 stoweidlem57 46829 fourierdlem48 46926 fourierdlem51 46929 fourierdlem73 46951 fourierdlem81 46959 elaa2 47006 etransclem32 47038 sge0iunmptlemre 47187 voliunsge0lem 47244 meaiuninc3v 47256 isomenndlem 47302 ovnsubaddlem1 47342 hoidmvlelem1 47367 hoidmvlelem5 47371 smfaddlem1 47535 2reu7 47906 2reu8 47907 f1oresf1o2 48086 mogoldbb 48608 2zrngagrp 49071 2zrngmmgm 49074 |
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