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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 2149 | . 2 ⊢ (∃𝑥𝜑 → ∀𝑥∃𝑥𝜑) | |
| 2 | 1 | nf5i 2152 | 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 2147 |
| This theorem depends on definitions: df-bi 207 df-ex 1782 df-nf 1786 |
| This theorem is referenced by: nfa1 2157 nfnf1 2160 sbalex 2250 nf6 2290 exdistrf 2452 nfeu1 2590 euor2 2614 2moexv 2628 moexexvw 2629 2moswapv 2630 2euexv 2632 eupicka 2635 mopick2 2638 moexex 2639 2moex 2641 2euex 2642 2moswap 2645 2mo 2649 2eu7 2659 2eu8 2660 nfre1 3263 ceqsexg 3609 morex 3679 intab 4935 nfopab1 5170 nfopab2 5171 axrep1 5227 axrep2 5229 axrep3 5230 axrep4OLD 5233 eusv2nf 5342 copsexgw 5446 copsexg 5447 copsex2t 5448 mosubopt 5466 dfid3 5530 dmcossOLD 5933 imadif 6584 oprabidw 7399 nfoprab1 7429 nfoprab2 7430 nfoprab3 7431 zfcndrep 10537 zfcndpow 10539 zfcndreg 10540 zfcndinf 10541 reclem2pr 10971 ex-natded9.26 30506 brabgaf 32696 bnj607 35092 bnj849 35101 bnj1398 35210 bnj1449 35224 finminlem 36534 exisym1 36640 bj-alexbiex 36944 bj-exexbiex 36945 bj-biexal2 36951 bj-biexex 36954 bj-sbf3 37087 bj-axseprep 37322 bj-axreprepsep 37323 copsex2d 37394 sbexi 38364 ac6s6 38423 nfe2 42585 e2ebind 44919 e2ebindVD 45267 e2ebindALT 45284 stoweidlem57 46415 ovncvrrp 46922 ich2ex 47828 ichreuopeq 47833 reuopreuprim 47886 pgind 50076 |
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