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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 3146 | . 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 3141 |
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 3146 |
This theorem is referenced by: r19.29anOLD 3334 2rmorex 3747 2reurex 3752 reuan 3882 2reu4lem 4467 nfiu1 4955 reusv2lem3 5303 fvelimad 6734 fsnex 7041 eusvobj2 7151 fiun 7646 f1iun 7647 zfregcl 9060 scott0 9317 ac6c4 9905 lbzbi 12339 mreiincl 16869 lss1d 19737 neiptopnei 21742 neitr 21790 utopsnneiplem 22858 cfilucfil 23171 2sqmo 26015 mptelee 26683 isch3 29020 atom1d 30132 opreu2reuALT 30242 xrofsup 30494 locfinreflem 31106 esumc 31312 esumrnmpt2 31329 hasheuni 31346 esumcvg 31347 esumcvgre 31352 voliune 31490 volfiniune 31491 ddemeas 31497 eulerpartlemgvv 31636 bnj900 32203 bnj1189 32283 bnj1204 32286 bnj1398 32308 bnj1444 32317 bnj1445 32318 bnj1446 32319 bnj1447 32320 bnj1467 32328 bnj1518 32338 bnj1519 32339 nosupbnd2 33218 iooelexlt 34645 fvineqsneq 34695 ptrest 34893 poimirlem26 34920 indexa 35010 filbcmb 35017 sdclem1 35020 heibor1 35090 dihglblem5 38436 suprnmpt 41437 disjinfi 41461 upbdrech 41579 ssfiunibd 41583 infxrunb2 41643 supxrunb3 41679 iccshift 41801 iooshift 41805 islpcn 41927 limsupre 41929 limclner 41939 limsupre3uzlem 42023 climuzlem 42031 xlimmnfv 42122 xlimpnfv 42126 itgperiod 42273 stoweidlem53 42345 stoweidlem57 42349 fourierdlem48 42446 fourierdlem51 42449 fourierdlem73 42471 fourierdlem81 42479 elaa2 42526 etransclem32 42558 sge0iunmptlemre 42704 voliunsge0lem 42761 meaiuninc3v 42773 isomenndlem 42819 ovnsubaddlem1 42859 hoidmvlelem1 42884 hoidmvlelem5 42888 smfaddlem1 43046 2reu7 43317 2reu8 43318 f1oresf1o2 43497 mogoldbb 43957 2zrngagrp 44221 2zrngmmgm 44224 |
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