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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 2167 | . 2 ⊢ (∃𝑥𝜑 → ∀𝑥∃𝑥𝜑) | |
| 2 | 1 | nf5i 2170 | 1 ⊢ Ⅎ𝑥∃𝑥𝜑 |
| Colors of variables: wff setvar class |
| Syntax hints: ∃wex 1789 Ⅎwnf 1793 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1805 ax-4 1819 ax-10 2165 |
| This theorem depends on definitions: df-bi 209 df-ex 1790 df-nf 1794 |
| This theorem is referenced by: nfa1 2175 nfnf1 2178 sbalex 2267 nf6 2307 exdistrf 2468 nfeu1 2606 euor2 2630 2moexv 2644 moexexvw 2645 2moswapv 2646 2euexv 2648 eupicka 2651 mopick2 2654 moexex 2655 2moex 2657 2euex 2658 2moswap 2661 2mo 2665 2eu7 2674 2eu8 2675 nfre1 3277 ceqsexg 3603 morex 3672 intab 4926 nfopab1 5160 nfopab2 5161 axrep1 5218 axrep2 5220 axrep3 5221 axrep4OLD 5224 eusv2nf 5342 copsexgwOLD 5449 copsexg 5450 copsex2t 5451 mosubopt 5469 dfid3 5534 dmcossOLD 5941 imadif 6590 oprabidw 7412 nfoprab1 7442 nfoprab2 7443 nfoprab3 7444 zfcndrep 10558 zfcndpow 10560 zfcndreg 10561 zfcndinf 10562 reclem2pr 10992 ex-natded9.26 30556 brabgaf 32747 bnj607 35158 bnj849 35167 bnj1398 35276 bnj1449 35290 finminlem 36616 exisym1 36722 bj-alexbiex 37112 bj-exexbiex 37113 bj-biexal2 37119 bj-biexex 37122 bj-sbf3 37262 bj-axseprep 37497 bj-axreprepsep 37498 copsex2d 37569 sbexi 38550 ac6s6 38609 nfe2 42770 e2ebind 45077 e2ebindVD 45425 e2ebindALT 45442 stoweidlem57 46569 ovncvrrp 47076 ich2ex 48012 ichreuopeq 48017 reuopreuprim 48070 pgind 50276 |
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