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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 2182 | . 2 ⊢ (∃𝑥𝜑 → ∀𝑥∃𝑥𝜑) | |
| 2 | 1 | nf5i 2186 | 1 ⊢ Ⅎ𝑥∃𝑥𝜑 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∃wex 1812 Ⅎwnf 1816 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-10 2180 |
| This proof depends on definitions: df-bi 210 df-ex 1813 df-nf 1817 |
| This theorem is used by: nfa1 2191 nfnf1 2194 sbalex 2282 nf6 2320 exdistrf 2479 nfeu1 2617 euor2 2641 2moexv 2655 moexexvw 2656 2moswapv 2657 2euexv 2659 eupicka 2662 mopick2 2665 moexex 2666 2moex 2668 2euex 2669 2moswap 2672 2mo 2676 2eu7 2685 2eu8 2686 nfre1 3291 ceqsexg 3610 morex 3680 intab 4943 nfopab1 5181 nfopab2 5182 axrep1 5239 axrep2 5241 axrep3 5242 eusv2nf 5364 copsexgwOLD 5468 copsexg 5469 copsex2t 5471 mosubopt 5489 mosubott 5491 dfid3 5556 dmcossOLD 5970 imadif 6654 oprabidw 7482 nfoprab1 7512 nfoprab2 7513 nfoprab3 7514 zfcndrep 10738 zfcndpow 10740 zfcndreg 10741 zfcndinf 10742 reclem2pr 11172 ex-natded9.26 31077 brabgaf 33298 bnj607 35657 bnj849 35666 bnj1398 35775 bnj1449 35789 finminlem 37321 exisym1 37427 bj-alexbiex 37816 bj-exexbiex 37817 bj-biexal2 37823 bj-biexex 37826 bj-sbf3 37966 bj-axseprep 38260 bj-axreprepsep 38261 copsex2d 38331 sbexi 39311 ac6s6 39370 nfe2 43534 e2ebind 45806 e2ebindVD 46154 e2ebindALT 46171 stoweidlem57 47340 ovncvrrp 47847 ich2ex 48823 ichreuopeq 48828 reuopreuprim 48881 pgind 51216 |
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