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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 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 3086 |
| 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 3087 |
| This theorem is used by: 2rmorex 3712 2reurex 3718 reuan 3844 2reu4lem 4479 nfiu1 4986 reusv2lem3 5365 fvelimad 6945 fsnex 7284 eusvobj2 7405 fiun 7940 f1iun 7941 zfregclOLD 9567 scott0b 9876 scott0OLD 9877 ac6c4 10483 lbzbi 12985 mreiincl 17680 lss1d 21147 neiptopnei 23357 neitr 23405 utopsnneiplem 24473 cfilucfil 24785 2sqmo 27673 nosupbnd2 27952 noinfbnd2 27967 mpteleeOLD 29352 isch3 31722 atom1d 32834 opreu2reuALT 32952 iinabrex 33042 xrofsup 33238 locfinreflem 34350 esumc 34561 esumrnmpt2 34578 hasheuni 34595 esumcvg 34596 esumcvgre 34601 voliune 34740 volfiniune 34741 ddemeas 34747 eulerpartlemgvv 34887 bnj900 35438 bnj1189 35518 bnj1204 35521 bnj1398 35543 bnj1444 35552 bnj1445 35553 bnj1446 35554 bnj1447 35555 bnj1467 35563 bnj1518 35573 bnj1519 35574 iooelexlt 38116 fvineqsneq 38166 ptrest 38368 poimirlem26 38395 indexa 38483 filbcmb 38490 sdclem1 38493 heibor1 38560 dihglblem5 42171 unielss 44059 oaun3lem1 44215 suprnmpt 46006 disjinfi 46024 upbdrech 46138 ssfiunibd 46142 infxrunb2 46197 supxrunb3 46228 iccshift 46348 iooshift 46352 islpcn 46467 limsupre 46469 limclner 46479 limsupre3uzlem 46563 climuzlem 46571 xlimmnfv 46662 xlimpnfv 46666 itgperiod 46809 stoweidlem53 46881 stoweidlem57 46885 fourierdlem48 46982 fourierdlem51 46985 fourierdlem73 47007 fourierdlem81 47015 elaa2 47062 etransclem32 47094 sge0iunmptlemre 47243 voliunsge0lem 47300 meaiuninc3v 47312 isomenndlem 47358 ovnsubaddlem1 47398 hoidmvlelem1 47423 hoidmvlelem5 47427 smfaddlem1 47591 2reu7 47999 2reu8 48000 f1oresf1o2 48179 mogoldbb 48701 2zrngagrp 49164 2zrngmmgm 49167 |
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