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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 3701 2reurex 3707 reuan 3835 2reu4lem 4464 nfiu1 4970 nfiu1OLD 4971 reusv2lem3 5338 fvelimad 6902 fsnex 7232 eusvobj2 7353 fiun 7890 f1iun 7891 zfregclOLD 9504 scott0 9804 ac6c4 10397 lbzbi 12880 mreiincl 17552 lss1d 20952 neiptopnei 23110 neitr 23158 utopsnneiplem 24225 cfilucfil 24537 2sqmo 27417 nosupbnd2 27697 noinfbnd2 27712 mpteleeOLD 28981 isch3 31330 atom1d 32442 opreu2reuALT 32564 iinabrex 32657 xrofsup 32858 locfinreflem 34003 esumc 34214 esumrnmpt2 34231 hasheuni 34248 esumcvg 34249 esumcvgre 34254 voliune 34392 volfiniune 34393 ddemeas 34399 eulerpartlemgvv 34539 bnj900 35090 bnj1189 35170 bnj1204 35173 bnj1398 35195 bnj1444 35204 bnj1445 35205 bnj1446 35206 bnj1447 35207 bnj1467 35215 bnj1518 35225 bnj1519 35226 iooelexlt 37695 fvineqsneq 37745 ptrest 37957 poimirlem26 37984 indexa 38071 filbcmb 38078 sdclem1 38081 heibor1 38148 dihglblem5 41761 unielss 43667 oaun3lem1 43823 suprnmpt 45625 disjinfi 45643 upbdrech 45759 ssfiunibd 45763 infxrunb2 45818 supxrunb3 45849 iccshift 45969 iooshift 45973 islpcn 46088 limsupre 46090 limclner 46100 limsupre3uzlem 46184 climuzlem 46192 xlimmnfv 46283 xlimpnfv 46287 itgperiod 46430 stoweidlem53 46502 stoweidlem57 46506 fourierdlem48 46603 fourierdlem51 46606 fourierdlem73 46628 fourierdlem81 46636 elaa2 46683 etransclem32 46715 sge0iunmptlemre 46864 voliunsge0lem 46921 meaiuninc3v 46933 isomenndlem 46979 ovnsubaddlem1 47019 hoidmvlelem1 47044 hoidmvlelem5 47048 smfaddlem1 47212 2reu7 47574 2reu8 47575 f1oresf1o2 47754 mogoldbb 48276 2zrngagrp 48740 2zrngmmgm 48743 |
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