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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 3088 | . 2 ⊢ (∃𝑥 ∈ 𝐴 𝜑 ↔ ∃𝑥(𝑥 ∈ 𝐴 ∧ 𝜑)) | |
| 2 | nfe1 2187 | . 2 ⊢ Ⅎ𝑥∃𝑥(𝑥 ∈ 𝐴 ∧ 𝜑) | |
| 3 | 1, 2 | nfxfr 1886 | 1 ⊢ Ⅎ𝑥∃𝑥 ∈ 𝐴 𝜑 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∧ wa 401 ∃wex 1812 Ⅎwnf 1816 ∈ wcel 2145 ∃wrex 3087 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-10 2178 |
| This proof depends on definitions: df-bi 210 df-ex 1813 df-nf 1817 df-rex 3088 |
| This theorem is used by: 2rmorex 3712 2reurex 3718 reuan 3844 2reu4lem 4479 nfiu1 4986 reusv2lem3 5362 fvelimad 6950 fsnex 7289 eusvobj2 7410 fiun 7953 f1iun 7954 zfregclOLD 9582 scott0b 9930 scott0OLD 9931 ac6c4 10552 lbzbi 13056 mreiincl 17759 lss1d 21231 neiptopnei 23443 neitr 23491 utopsnneiplem 24559 cfilucfil 24871 2sqmo 27757 nosupbnd2 28066 noinfbnd2 28081 mpteleeOLD 29466 isch3 31836 atom1d 32948 opreu2reuALT 33066 iinabrex 33156 xrofsup 33352 locfinreflem 34465 esumc 34676 esumrnmpt2 34693 hasheuni 34710 esumcvg 34711 esumcvgre 34716 voliune 34855 volfiniune 34856 ddemeas 34862 eulerpartlemgvv 35001 bnj900 35552 bnj1189 35632 bnj1204 35635 bnj1398 35657 bnj1444 35666 bnj1445 35667 bnj1446 35668 bnj1447 35669 bnj1467 35677 bnj1518 35687 bnj1519 35688 iooelexlt 38265 fvineqsneq 38315 ptrest 38517 poimirlem26 38544 indexa 38647 filbcmb 38654 sdclem1 38657 heibor1 38724 dihglblem5 42335 unielss 44204 oaun3lem1 44360 suprnmpt 46158 disjinfi 46176 upbdrech 46290 ssfiunibd 46294 infxrunb2 46348 supxrunb3 46379 iccshift 46499 iooshift 46503 islpcn 46618 limsupre 46620 limclner 46630 limsupre3uzlem 46714 climuzlem 46722 xlimmnfv 46813 xlimpnfv 46817 itgperiod 46960 stoweidlem53 47032 stoweidlem57 47036 fourierdlem48 47133 fourierdlem51 47136 fourierdlem73 47158 fourierdlem81 47166 elaa2 47213 etransclem32 47245 sge0iunmptlemre 47394 voliunsge0lem 47451 meaiuninc3v 47463 isomenndlem 47509 ovnsubaddlem1 47549 hoidmvlelem1 47574 hoidmvlelem5 47578 smfaddlem1 47742 2reu7 48150 2reu8 48151 f1oresf1o2 48330 mogoldbb 48852 2zrngagrp 49315 2zrngmmgm 49318 |
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