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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 2021 | . 2 ⊢ (∃𝑥𝜑 → ∀𝑥∃𝑥𝜑) | |
2 | 1 | nf5i 2024 | 1 ⊢ Ⅎ𝑥∃𝑥𝜑 |
Colors of variables: wff setvar class |
Syntax hints: ∃wex 1704 Ⅎwnf 1708 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-10 2019 |
This theorem depends on definitions: df-bi 197 df-ex 1705 df-nf 1710 |
This theorem is referenced by: nfa1 2028 nfnf1 2031 nf6 2117 exdistrf 2333 nfmo1 2481 euor2 2514 eupicka 2537 mopick2 2540 moexex 2541 2moex 2543 2euex 2544 2moswap 2547 2mo 2551 2eu7 2559 2eu8 2560 nfre1 3005 ceqsexg 3334 morex 3390 intab 4507 nfopab1 4719 nfopab2 4720 axrep1 4772 axrep2 4773 axrep3 4774 axrep4 4775 eusv2nf 4864 copsexg 4956 copsex2t 4957 copsex2g 4958 mosubopt 4972 dfid3 5025 dmcoss 5385 imadif 5973 nfoprab1 6704 nfoprab2 6705 nfoprab3 6706 fsplit 7282 zfcndrep 9436 zfcndpow 9438 zfcndreg 9439 zfcndinf 9440 reclem2pr 9870 ex-natded9.26 27276 brabgaf 29420 bnj607 30986 bnj849 30995 bnj1398 31102 bnj1449 31116 finminlem 32312 exisym1 32423 bj-alexbiex 32690 bj-exexbiex 32691 bj-biexal2 32697 bj-biexex 32700 bj-axrep1 32788 bj-axrep2 32789 bj-axrep3 32790 bj-axrep4 32791 bj-sbf3 32826 sbexi 33916 ac6s6 33980 e2ebind 38779 e2ebindVD 39148 e2ebindALT 39165 stoweidlem57 40274 ovncvrrp 40778 |
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