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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 2177 | . 2 ⊢ (∃𝑥𝜑 → ∀𝑥∃𝑥𝜑) | |
| 2 | 1 | nf5i 2180 | 1 ⊢ Ⅎ𝑥∃𝑥𝜑 |
| Colors of variables: wff setvar class |
| Syntax hints: ∃wex 1799 Ⅎwnf 1803 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1815 ax-4 1829 ax-10 2175 |
| This theorem depends on definitions: df-bi 209 df-ex 1800 df-nf 1804 |
| This theorem is referenced by: nfa1 2185 nfnf1 2188 sbalex 2277 nf6 2317 exdistrf 2478 nfeu1 2616 euor2 2640 2moexv 2654 moexexvw 2655 2moswapv 2656 2euexv 2658 eupicka 2661 mopick2 2664 moexex 2665 2moex 2667 2euex 2668 2moswap 2671 2mo 2675 2eu7 2684 2eu8 2685 nfre1 3287 ceqsexg 3612 morex 3682 intab 4936 nfopab1 5170 nfopab2 5171 axrep1 5228 axrep2 5230 axrep3 5231 axrep4OLD 5234 eusv2nf 5352 copsexgwOLD 5459 copsexg 5460 copsex2t 5461 mosubopt 5479 dfid3 5545 dmcossOLD 5952 imadif 6605 oprabidw 7427 nfoprab1 7457 nfoprab2 7458 nfoprab3 7459 zfcndrep 10572 zfcndpow 10574 zfcndreg 10575 zfcndinf 10576 reclem2pr 11006 ex-natded9.26 30618 brabgaf 32805 bnj607 35208 bnj849 35217 bnj1398 35326 bnj1449 35340 finminlem 36675 exisym1 36781 bj-alexbiex 37171 bj-exexbiex 37172 bj-biexal2 37178 bj-biexex 37181 bj-sbf3 37321 bj-axseprep 37556 bj-axreprepsep 37557 copsex2d 37628 sbexi 38609 ac6s6 38668 nfe2 42829 e2ebind 45136 e2ebindVD 45484 e2ebindALT 45501 stoweidlem57 46628 ovncvrrp 47135 ich2ex 48071 ichreuopeq 48076 reuopreuprim 48129 pgind 50335 |
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