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| Mirrors > Home > ILE Home > Th. List > nfa1 | GIF version | ||
| Description: 𝑥 is not free in ∀𝑥𝜑. (Contributed by Mario Carneiro, 11-Aug-2016.) |
| Ref | Expression |
|---|---|
| nfa1 | ⊢ Ⅎ𝑥∀𝑥𝜑 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | hba1 1589 | . 2 ⊢ (∀𝑥𝜑 → ∀𝑥∀𝑥𝜑) | |
| 2 | 1 | nfi 1511 | 1 ⊢ Ⅎ𝑥∀𝑥𝜑 |
| Colors of variables: wff set class |
| Syntax hints: ∀wal 1396 Ⅎwnf 1509 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-gen 1498 ax-ial 1583 |
| This theorem depends on definitions: df-bi 117 df-nf 1510 |
| This theorem is referenced by: axc4i 1591 nfnf1 1593 nfa2 1628 nfia1 1629 alexdc 1668 nf2 1716 cbv1h 1795 sbf2 1827 sb4or 1882 nfsbxy 1998 nfsbxyt 1999 sbcomxyyz 2028 sbalyz 2055 dvelimALT 2066 hbe1a 2079 nfeu1 2093 moim 2147 euexex 2168 nfaba1 2392 nfabdw 2405 nfra1 2575 ceqsalg 2844 elrab3t 2975 mo2icl 2999 csbie2t 3190 sbcnestgf 3193 dfss4st 3458 dfnfc2 3937 mpteq12f 4195 copsex2t 4366 ssopab2 4399 alxfr 4587 eunex 4688 mosubopt 4820 fv3 5698 fvmptt 5774 fnoprabg 6162 fiintim 7204 bj-exlimmp 16653 bdsepnft 16769 setindft 16847 strcollnft 16866 |
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