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Mirrors > Home > MPE Home > Th. List > nfe1 | Structured version Visualization version GIF version |
Description: The setvar 𝑥 is not free in ∃𝑥𝜑. (Contributed by Mario Carneiro, 11-Aug-2016.) |
Ref | Expression |
---|---|
nfe1 | ⊢ Ⅎ𝑥∃𝑥𝜑 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | hbe1 2008 | . 2 ⊢ (∃𝑥𝜑 → ∀𝑥∃𝑥𝜑) | |
2 | 1 | nf5i 2011 | 1 ⊢ Ⅎ𝑥∃𝑥𝜑 |
Colors of variables: wff setvar class |
Syntax hints: ∃wex 1695 Ⅎwnf 1699 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-10 2006 |
This theorem depends on definitions: df-bi 196 df-ex 1696 df-nf 1701 |
This theorem is referenced by: nfa1 2015 nfnf1 2018 nf6 2103 exdistrf 2321 nfmo1 2469 euor2 2502 eupicka 2525 mopick2 2528 moexex 2529 2moex 2531 2euex 2532 2moswap 2535 2mo 2539 2eu7 2547 2eu8 2548 nfre1 2988 ceqsexg 3304 morex 3357 intab 4442 nfopab1 4651 nfopab2 4652 axrep1 4700 axrep2 4701 axrep3 4702 axrep4 4703 eusv2nf 4790 copsexg 4882 copsex2t 4883 copsex2g 4884 mosubopt 4897 dfid3 4954 dmcoss 5306 imadif 5887 nfoprab1 6602 nfoprab2 6603 nfoprab3 6604 fsplit 7169 zfcndrep 9315 zfcndpow 9317 zfcndreg 9318 zfcndinf 9319 reclem2pr 9749 ex-natded9.26 26668 brabgaf 28800 bnj607 30240 bnj849 30249 bnj1398 30356 bnj1449 30370 finminlem 31482 exisym1 31593 bj-alexbiex 31877 bj-exexbiex 31878 bj-biexal2 31884 bj-biexex 31887 bj-axrep1 31976 bj-axrep2 31977 bj-axrep3 31978 bj-axrep4 31979 bj-sbf3 32014 bj-xnex 32245 sbexi 33086 ac6s6 33150 e2ebind 37800 e2ebindVD 38170 e2ebindALT 38187 stoweidlem57 38950 ovncvrrp 39454 |
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