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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 3096 | . 2 ⊢ (∃𝑥 ∈ 𝐴 𝜑 ↔ ∃𝑥(𝑥 ∈ 𝐴 ∧ 𝜑)) | |
| 2 | nfe1 2191 | . 2 ⊢ Ⅎ𝑥∃𝑥(𝑥 ∈ 𝐴 ∧ 𝜑) | |
| 3 | 1, 2 | nfxfr 1880 | 1 ⊢ Ⅎ𝑥∃𝑥 ∈ 𝐴 𝜑 |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 400 ∃wex 1806 Ⅎwnf 1810 ∈ wcel 2149 ∃wrex 3095 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-10 2182 |
| This theorem depends on definitions: df-bi 210 df-ex 1807 df-nf 1811 df-rex 3096 |
| This theorem is referenced by: 2rmorex 3726 2reurex 3732 reuan 3858 2reu4lem 4489 nfiu1 4996 reusv2lem3 5372 fvelimad 6949 fsnex 7282 eusvobj2 7403 fiun 7939 f1iun 7940 zfregclOLD 9556 scott0 9859 ac6c4 10464 lbzbi 12959 mreiincl 17647 lss1d 21061 neiptopnei 23257 neitr 23305 utopsnneiplem 24372 cfilucfil 24684 2sqmo 27566 nosupbnd2 27845 noinfbnd2 27860 mpteleeOLD 29185 isch3 31533 atom1d 32645 opreu2reuALT 32763 iinabrex 32854 xrofsup 33052 locfinreflem 34174 esumc 34385 esumrnmpt2 34402 hasheuni 34419 esumcvg 34420 esumcvgre 34425 voliune 34563 volfiniune 34564 ddemeas 34570 eulerpartlemgvv 34710 bnj900 35261 bnj1189 35341 bnj1204 35344 bnj1398 35366 bnj1444 35375 bnj1445 35376 bnj1446 35377 bnj1447 35378 bnj1467 35386 bnj1518 35396 bnj1519 35397 iooelexlt 37895 fvineqsneq 37945 ptrest 38157 poimirlem26 38184 indexa 38271 filbcmb 38278 sdclem1 38281 heibor1 38348 dihglblem5 41961 unielss 43836 oaun3lem1 43992 suprnmpt 45783 disjinfi 45801 upbdrech 45915 ssfiunibd 45919 infxrunb2 45974 supxrunb3 46005 iccshift 46125 iooshift 46129 islpcn 46244 limsupre 46246 limclner 46256 limsupre3uzlem 46340 climuzlem 46348 xlimmnfv 46439 xlimpnfv 46443 itgperiod 46586 stoweidlem53 46658 stoweidlem57 46662 fourierdlem48 46759 fourierdlem51 46762 fourierdlem73 46784 fourierdlem81 46792 elaa2 46839 etransclem32 46871 sge0iunmptlemre 47020 voliunsge0lem 47077 meaiuninc3v 47089 isomenndlem 47135 ovnsubaddlem1 47175 hoidmvlelem1 47200 hoidmvlelem5 47204 smfaddlem1 47368 2reu7 47736 2reu8 47737 f1oresf1o2 47916 mogoldbb 48438 2zrngagrp 48902 2zrngmmgm 48905 |
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