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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 2144 | . 2 ⊢ (∃𝑥𝜑 → ∀𝑥∃𝑥𝜑) | |
2 | 1 | nf5i 2147 | 1 ⊢ Ⅎ𝑥∃𝑥𝜑 |
Colors of variables: wff setvar class |
Syntax hints: ∃wex 1781 Ⅎwnf 1785 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-10 2142 |
This theorem depends on definitions: df-bi 210 df-ex 1782 df-nf 1786 |
This theorem is referenced by: nfa1 2152 nfnf1 2155 nf6 2287 exdistrf 2458 nfeu1ALT 2650 euor2 2674 2moexv 2689 moexexvw 2690 2moswapv 2691 2euexv 2693 eupicka 2696 mopick2 2699 moexex 2700 2moex 2702 2euex 2703 2moswap 2706 2mo 2710 2eu7 2720 2eu8 2721 nfre1 3265 ceqsexg 3594 morex 3658 intab 4868 nfopab1 5099 nfopab2 5100 axrep1 5155 axrep2 5157 axrep3 5158 axrep4 5159 eusv2nf 5261 copsexgw 5346 copsexg 5347 copsex2t 5348 copsex2g 5349 mosubopt 5365 dfid3 5427 dmcoss 5807 imadif 6408 oprabidw 7166 nfoprab1 7194 nfoprab2 7195 nfoprab3 7196 fsplitOLD 7796 zfcndrep 10025 zfcndpow 10027 zfcndreg 10028 zfcndinf 10029 reclem2pr 10459 ex-natded9.26 28204 brabgaf 30372 bnj607 32298 bnj849 32307 bnj1398 32416 bnj1449 32430 finminlem 33779 exisym1 33885 bj-alexbiex 34146 bj-exexbiex 34147 bj-biexal2 34153 bj-biexex 34156 bj-sbf3 34277 copsex2d 34554 sbexi 35551 ac6s6 35610 e2ebind 41269 e2ebindVD 41618 e2ebindALT 41635 stoweidlem57 42699 ovncvrrp 43203 ich2ex 43985 ichreuopeq 43990 reuopreuprim 44043 |
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