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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 3087 | . 2 ⊢ (∃𝑥 ∈ 𝐴 𝜑 ↔ ∃𝑥(𝑥 ∈ 𝐴 ∧ 𝜑)) | |
| 2 | nfe1 2186 | . 2 ⊢ Ⅎ𝑥∃𝑥(𝑥 ∈ 𝐴 ∧ 𝜑) | |
| 3 | 1, 2 | nfxfr 1885 | 1 ⊢ Ⅎ𝑥∃𝑥 ∈ 𝐴 𝜑 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∧ wa 401 ∃wex 1811 Ⅎwnf 1815 ∈ wcel 2144 ∃wrex 3086 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-10 2177 |
| This proof depends on definitions: df-bi 210 df-ex 1812 df-nf 1816 df-rex 3087 |
| This theorem is used by: 2rmorex 3711 2reurex 3717 reuan 3844 2reu4lem 4478 nfiu1 4985 reusv2lem3 5362 fvelimad 6957 fsnex 7295 eusvobj2 7416 fiun 7959 f1iun 7960 zfregclOLD 9596 scott0b 9944 scott0OLD 9945 ac6c4 10566 lbzbi 13070 mreiincl 17775 lss1d 21247 neiptopnei 23459 neitr 23507 utopsnneiplem 24575 cfilucfil 24887 2sqmo 27773 nosupbnd2 28082 noinfbnd2 28097 mpteleeOLD 29482 isch3 31852 atom1d 32964 opreu2reuALT 33124 iinabrex 33214 xrofsup 33409 locfinreflem 34522 esumc 34733 esumrnmpt2 34750 hasheuni 34767 esumcvg 34768 esumcvgre 34773 voliune 34912 volfiniune 34913 ddemeas 34919 eulerpartlemgvv 35058 bnj900 35609 bnj1189 35689 bnj1204 35692 bnj1398 35714 bnj1444 35723 bnj1445 35724 bnj1446 35725 bnj1447 35726 bnj1467 35734 bnj1518 35744 bnj1519 35745 srepdf 36010 iooelexlt 38394 fvineqsneq 38444 ptrest 38646 poimirlem26 38673 indexa 38776 filbcmb 38783 sdclem1 38786 heibor1 38853 dihglblem5 42464 unielss 44329 oaun3lem1 44485 suprnmpt 46297 disjinfi 46315 upbdrech 46429 ssfiunibd 46433 infxrunb2 46487 supxrunb3 46518 iccshift 46638 iooshift 46642 islpcn 46757 limsupre 46759 limclner 46769 limsupre3uzlem 46853 climuzlem 46861 xlimmnfv 46952 xlimpnfv 46956 itgperiod 47099 stoweidlem53 47171 stoweidlem57 47175 fourierdlem48 47272 fourierdlem51 47275 fourierdlem73 47297 fourierdlem81 47305 elaa2 47352 etransclem32 47384 sge0iunmptlemre 47533 voliunsge0lem 47590 meaiuninc3v 47602 isomenndlem 47648 ovnsubaddlem1 47688 hoidmvlelem1 47713 hoidmvlelem5 47717 smfaddlem1 47881 2reu7 48290 2reu8 48291 f1oresf1o2 48469 mogoldbb 48991 2zrngagrp 49454 2zrngmmgm 49457 |
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