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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 3062 | . 2 ⊢ (∃𝑥 ∈ 𝐴 𝜑 ↔ ∃𝑥(𝑥 ∈ 𝐴 ∧ 𝜑)) | |
| 2 | nfe1 2156 | . 2 ⊢ Ⅎ𝑥∃𝑥(𝑥 ∈ 𝐴 ∧ 𝜑) | |
| 3 | 1, 2 | nfxfr 1855 | 1 ⊢ Ⅎ𝑥∃𝑥 ∈ 𝐴 𝜑 |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 395 ∃wex 1781 Ⅎwnf 1785 ∈ wcel 2114 ∃wrex 3061 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-10 2147 |
| This theorem depends on definitions: df-bi 207 df-ex 1782 df-nf 1786 df-rex 3062 |
| This theorem is referenced by: 2rmorex 3700 2reurex 3706 reuan 3834 2reu4lem 4463 nfiu1 4969 nfiu1OLD 4970 reusv2lem3 5342 fvelimad 6907 fsnex 7238 eusvobj2 7359 fiun 7896 f1iun 7897 zfregclOLD 9510 scott0 9810 ac6c4 10403 lbzbi 12886 mreiincl 17558 lss1d 20958 neiptopnei 23097 neitr 23145 utopsnneiplem 24212 cfilucfil 24524 2sqmo 27400 nosupbnd2 27680 noinfbnd2 27695 mpteleeOLD 28964 isch3 31312 atom1d 32424 opreu2reuALT 32546 iinabrex 32639 xrofsup 32840 locfinreflem 33984 esumc 34195 esumrnmpt2 34212 hasheuni 34229 esumcvg 34230 esumcvgre 34235 voliune 34373 volfiniune 34374 ddemeas 34380 eulerpartlemgvv 34520 bnj900 35071 bnj1189 35151 bnj1204 35154 bnj1398 35176 bnj1444 35185 bnj1445 35186 bnj1446 35187 bnj1447 35188 bnj1467 35196 bnj1518 35206 bnj1519 35207 iooelexlt 37678 fvineqsneq 37728 ptrest 37940 poimirlem26 37967 indexa 38054 filbcmb 38061 sdclem1 38064 heibor1 38131 dihglblem5 41744 unielss 43646 oaun3lem1 43802 suprnmpt 45604 disjinfi 45622 upbdrech 45738 ssfiunibd 45742 infxrunb2 45797 supxrunb3 45828 iccshift 45948 iooshift 45952 islpcn 46067 limsupre 46069 limclner 46079 limsupre3uzlem 46163 climuzlem 46171 xlimmnfv 46262 xlimpnfv 46266 itgperiod 46409 stoweidlem53 46481 stoweidlem57 46485 fourierdlem48 46582 fourierdlem51 46585 fourierdlem73 46607 fourierdlem81 46615 elaa2 46662 etransclem32 46694 sge0iunmptlemre 46843 voliunsge0lem 46900 meaiuninc3v 46912 isomenndlem 46958 ovnsubaddlem1 46998 hoidmvlelem1 47023 hoidmvlelem5 47027 smfaddlem1 47191 2reu7 47559 2reu8 47560 f1oresf1o2 47739 mogoldbb 48261 2zrngagrp 48725 2zrngmmgm 48728 |
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