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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 2148 | . 2 ⊢ (∃𝑥𝜑 → ∀𝑥∃𝑥𝜑) | |
| 2 | 1 | nf5i 2151 | 1 ⊢ Ⅎ𝑥∃𝑥𝜑 |
| Colors of variables: wff setvar class |
| Syntax hints: ∃wex 1780 Ⅎwnf 1784 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-10 2146 |
| This theorem depends on definitions: df-bi 207 df-ex 1781 df-nf 1785 |
| This theorem is referenced by: nfa1 2156 nfnf1 2159 sbalex 2249 nf6 2289 exdistrf 2451 nfeu1 2589 euor2 2613 2moexv 2627 moexexvw 2628 2moswapv 2629 2euexv 2631 eupicka 2634 mopick2 2637 moexex 2638 2moex 2640 2euex 2641 2moswap 2644 2mo 2648 2eu7 2658 2eu8 2659 nfre1 3261 ceqsexg 3607 morex 3677 intab 4933 nfopab1 5168 nfopab2 5169 axrep1 5225 axrep2 5227 axrep3 5228 axrep4OLD 5231 eusv2nf 5340 copsexgw 5438 copsexg 5439 copsex2t 5440 mosubopt 5458 dfid3 5522 dmcossOLD 5925 imadif 6576 oprabidw 7389 nfoprab1 7419 nfoprab2 7420 nfoprab3 7421 zfcndrep 10525 zfcndpow 10527 zfcndreg 10528 zfcndinf 10529 reclem2pr 10959 ex-natded9.26 30494 brabgaf 32684 bnj607 35072 bnj849 35081 bnj1398 35190 bnj1449 35204 finminlem 36512 exisym1 36618 bj-alexbiex 36900 bj-exexbiex 36901 bj-biexal2 36907 bj-biexex 36910 bj-sbf3 37040 copsex2d 37344 sbexi 38314 ac6s6 38373 nfe2 42469 e2ebind 44804 e2ebindVD 45152 e2ebindALT 45169 stoweidlem57 46301 ovncvrrp 46808 ich2ex 47714 ichreuopeq 47719 reuopreuprim 47772 pgind 49962 |
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