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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 3059 | . 2 ⊢ (∃𝑥 ∈ 𝐴 𝜑 ↔ ∃𝑥(𝑥 ∈ 𝐴 ∧ 𝜑)) | |
| 2 | nfe1 2155 | . 2 ⊢ Ⅎ𝑥∃𝑥(𝑥 ∈ 𝐴 ∧ 𝜑) | |
| 3 | 1, 2 | nfxfr 1854 | 1 ⊢ Ⅎ𝑥∃𝑥 ∈ 𝐴 𝜑 |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 395 ∃wex 1780 Ⅎwnf 1784 ∈ wcel 2113 ∃wrex 3058 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-10 2146 |
| This theorem depends on definitions: df-bi 207 df-ex 1781 df-nf 1785 df-rex 3059 |
| This theorem is referenced by: 2rmorex 3710 2reurex 3716 reuan 3844 2reu4lem 4474 nfiu1 4980 nfiu1OLD 4981 reusv2lem3 5343 fvelimad 6899 fsnex 7227 eusvobj2 7348 fiun 7885 f1iun 7886 zfregclOLD 9498 scott0 9796 ac6c4 10389 lbzbi 12847 mreiincl 17513 lss1d 20912 neiptopnei 23074 neitr 23122 utopsnneiplem 24189 cfilucfil 24501 2sqmo 27402 nosupbnd2 27682 noinfbnd2 27697 mpteleeOLD 28917 isch3 31265 atom1d 32377 opreu2reuALT 32500 iinabrex 32593 xrofsup 32796 locfinreflem 33946 esumc 34157 esumrnmpt2 34174 hasheuni 34191 esumcvg 34192 esumcvgre 34197 voliune 34335 volfiniune 34336 ddemeas 34342 eulerpartlemgvv 34482 bnj900 35034 bnj1189 35114 bnj1204 35117 bnj1398 35139 bnj1444 35148 bnj1445 35149 bnj1446 35150 bnj1447 35151 bnj1467 35159 bnj1518 35169 bnj1519 35170 iooelexlt 37506 fvineqsneq 37556 ptrest 37759 poimirlem26 37786 indexa 37873 filbcmb 37880 sdclem1 37883 heibor1 37950 dihglblem5 41497 unielss 43402 oaun3lem1 43558 suprnmpt 45360 disjinfi 45378 upbdrech 45495 ssfiunibd 45499 infxrunb2 45554 supxrunb3 45585 iccshift 45706 iooshift 45710 islpcn 45825 limsupre 45827 limclner 45837 limsupre3uzlem 45921 climuzlem 45929 xlimmnfv 46020 xlimpnfv 46024 itgperiod 46167 stoweidlem53 46239 stoweidlem57 46243 fourierdlem48 46340 fourierdlem51 46343 fourierdlem73 46365 fourierdlem81 46373 elaa2 46420 etransclem32 46452 sge0iunmptlemre 46601 voliunsge0lem 46658 meaiuninc3v 46670 isomenndlem 46716 ovnsubaddlem1 46756 hoidmvlelem1 46781 hoidmvlelem5 46785 smfaddlem1 46949 2reu7 47299 2reu8 47300 f1oresf1o2 47479 mogoldbb 47973 2zrngagrp 48437 2zrngmmgm 48440 |
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