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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 3144 | . 2 ⊢ (∃𝑥 ∈ 𝐴 𝜑 ↔ ∃𝑥(𝑥 ∈ 𝐴 ∧ 𝜑)) | |
2 | nfe1 2154 | . 2 ⊢ Ⅎ𝑥∃𝑥(𝑥 ∈ 𝐴 ∧ 𝜑) | |
3 | 1, 2 | nfxfr 1853 | 1 ⊢ Ⅎ𝑥∃𝑥 ∈ 𝐴 𝜑 |
Colors of variables: wff setvar class |
Syntax hints: ∧ wa 398 ∃wex 1780 Ⅎwnf 1784 ∈ wcel 2114 ∃wrex 3139 |
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 2145 |
This theorem depends on definitions: df-bi 209 df-ex 1781 df-nf 1785 df-rex 3144 |
This theorem is referenced by: r19.29anOLD 3332 2rmorex 3745 2reurex 3750 reuan 3880 2reu4lem 4465 nfiu1 4953 reusv2lem3 5301 fvelimad 6732 fsnex 7039 eusvobj2 7149 fiun 7644 f1iun 7645 zfregcl 9058 scott0 9315 ac6c4 9903 lbzbi 12337 mreiincl 16867 lss1d 19735 neiptopnei 21740 neitr 21788 utopsnneiplem 22856 cfilucfil 23169 2sqmo 26013 mptelee 26681 isch3 29018 atom1d 30130 opreu2reuALT 30240 xrofsup 30492 locfinreflem 31104 esumc 31310 esumrnmpt2 31327 hasheuni 31344 esumcvg 31345 esumcvgre 31350 voliune 31488 volfiniune 31489 ddemeas 31495 eulerpartlemgvv 31634 bnj900 32201 bnj1189 32281 bnj1204 32284 bnj1398 32306 bnj1444 32315 bnj1445 32316 bnj1446 32317 bnj1447 32318 bnj1467 32326 bnj1518 32336 bnj1519 32337 nosupbnd2 33216 iooelexlt 34646 fvineqsneq 34696 ptrest 34906 poimirlem26 34933 indexa 35023 filbcmb 35030 sdclem1 35033 heibor1 35103 dihglblem5 38449 suprnmpt 41450 disjinfi 41474 upbdrech 41592 ssfiunibd 41596 infxrunb2 41656 supxrunb3 41692 iccshift 41814 iooshift 41818 islpcn 41940 limsupre 41942 limclner 41952 limsupre3uzlem 42036 climuzlem 42044 xlimmnfv 42135 xlimpnfv 42139 itgperiod 42286 stoweidlem53 42358 stoweidlem57 42362 fourierdlem48 42459 fourierdlem51 42462 fourierdlem73 42484 fourierdlem81 42492 elaa2 42539 etransclem32 42571 sge0iunmptlemre 42717 voliunsge0lem 42774 meaiuninc3v 42786 isomenndlem 42832 ovnsubaddlem1 42872 hoidmvlelem1 42897 hoidmvlelem5 42901 smfaddlem1 43059 2reu7 43330 2reu8 43331 f1oresf1o2 43510 mogoldbb 43970 2zrngagrp 44234 2zrngmmgm 44237 |
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