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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 2154 | . 2 ⊢ (∃𝑥𝜑 → ∀𝑥∃𝑥𝜑) | |
| 2 | 1 | nf5i 2157 | 1 ⊢ Ⅎ𝑥∃𝑥𝜑 |
| Colors of variables: wff setvar class |
| Syntax hints: ∃wex 1786 Ⅎwnf 1790 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-10 2152 |
| This theorem depends on definitions: df-bi 208 df-ex 1787 df-nf 1791 |
| This theorem is referenced by: nfa1 2162 nfnf1 2165 sbalex 2254 nf6 2294 exdistrf 2455 nfeu1 2593 euor2 2617 2moexv 2631 moexexvw 2632 2moswapv 2633 2euexv 2635 eupicka 2638 mopick2 2641 moexex 2642 2moex 2644 2euex 2645 2moswap 2648 2mo 2652 2eu7 2661 2eu8 2662 nfre1 3264 ceqsexg 3591 morex 3660 intab 4908 nfopab1 5142 nfopab2 5143 axrep1 5200 axrep2 5202 axrep3 5203 axrep4OLD 5206 eusv2nf 5324 copsexgwOLD 5431 copsexg 5432 copsex2t 5433 mosubopt 5451 dfid3 5516 dmcossOLD 5918 imadif 6569 oprabidw 7387 nfoprab1 7417 nfoprab2 7418 nfoprab3 7419 zfcndrep 10528 zfcndpow 10530 zfcndreg 10531 zfcndinf 10532 reclem2pr 10962 ex-natded9.26 30507 brabgaf 32698 bnj607 35098 bnj849 35107 bnj1398 35216 bnj1449 35230 finminlem 36546 exisym1 36652 bj-alexbiex 37042 bj-exexbiex 37043 bj-biexal2 37049 bj-biexex 37052 bj-sbf3 37192 bj-axseprep 37427 bj-axreprepsep 37428 copsex2d 37499 sbexi 38480 ac6s6 38539 nfe2 42700 e2ebind 45007 e2ebindVD 45355 e2ebindALT 45372 stoweidlem57 46500 ovncvrrp 47007 ich2ex 47943 ichreuopeq 47948 reuopreuprim 48001 pgind 50207 |
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