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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 3063 | . 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 3062 |
| 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 3063 |
| This theorem is referenced by: 2rmorex 3714 2reurex 3720 reuan 3848 2reu4lem 4478 nfiu1 4984 nfiu1OLD 4985 reusv2lem3 5347 fvelimad 6909 fsnex 7239 eusvobj2 7360 fiun 7897 f1iun 7898 zfregclOLD 9512 scott0 9810 ac6c4 10403 lbzbi 12861 mreiincl 17527 lss1d 20926 neiptopnei 23088 neitr 23136 utopsnneiplem 24203 cfilucfil 24515 2sqmo 27416 nosupbnd2 27696 noinfbnd2 27711 mpteleeOLD 28980 isch3 31329 atom1d 32441 opreu2reuALT 32563 iinabrex 32656 xrofsup 32858 locfinreflem 34018 esumc 34229 esumrnmpt2 34246 hasheuni 34263 esumcvg 34264 esumcvgre 34269 voliune 34407 volfiniune 34408 ddemeas 34414 eulerpartlemgvv 34554 bnj900 35105 bnj1189 35185 bnj1204 35188 bnj1398 35210 bnj1444 35219 bnj1445 35220 bnj1446 35221 bnj1447 35222 bnj1467 35230 bnj1518 35240 bnj1519 35241 iooelexlt 37617 fvineqsneq 37667 ptrest 37870 poimirlem26 37897 indexa 37984 filbcmb 37991 sdclem1 37994 heibor1 38061 dihglblem5 41674 unielss 43575 oaun3lem1 43731 suprnmpt 45533 disjinfi 45551 upbdrech 45667 ssfiunibd 45671 infxrunb2 45726 supxrunb3 45757 iccshift 45878 iooshift 45882 islpcn 45997 limsupre 45999 limclner 46009 limsupre3uzlem 46093 climuzlem 46101 xlimmnfv 46192 xlimpnfv 46196 itgperiod 46339 stoweidlem53 46411 stoweidlem57 46415 fourierdlem48 46512 fourierdlem51 46515 fourierdlem73 46537 fourierdlem81 46545 elaa2 46592 etransclem32 46624 sge0iunmptlemre 46773 voliunsge0lem 46830 meaiuninc3v 46842 isomenndlem 46888 ovnsubaddlem1 46928 hoidmvlelem1 46953 hoidmvlelem5 46957 smfaddlem1 47121 2reu7 47471 2reu8 47472 f1oresf1o2 47651 mogoldbb 48145 2zrngagrp 48609 2zrngmmgm 48612 |
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