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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 2247 nf6 2287 exdistrf 2449 nfeu1ALT 2587 euor2 2611 2moexv 2625 moexexvw 2626 2moswapv 2627 2euexv 2629 eupicka 2632 mopick2 2635 moexex 2636 2moex 2638 2euex 2639 2moswap 2642 2mo 2646 2eu7 2656 2eu8 2657 nfre1 3259 ceqsexg 3605 morex 3675 intab 4931 nfopab1 5166 nfopab2 5167 axrep1 5223 axrep2 5225 axrep3 5226 axrep4OLD 5229 eusv2nf 5338 copsexgw 5436 copsexg 5437 copsex2t 5438 mosubopt 5456 dfid3 5520 dmcossOLD 5923 imadif 6574 oprabidw 7387 nfoprab1 7417 nfoprab2 7418 nfoprab3 7419 zfcndrep 10523 zfcndpow 10525 zfcndreg 10526 zfcndinf 10527 reclem2pr 10957 ex-natded9.26 30443 brabgaf 32633 bnj607 35021 bnj849 35030 bnj1398 35139 bnj1449 35153 finminlem 36461 exisym1 36567 bj-alexbiex 36843 bj-exexbiex 36844 bj-biexal2 36850 bj-biexex 36853 bj-sbf3 36983 copsex2d 37283 sbexi 38253 ac6s6 38312 nfe2 42409 e2ebind 44746 e2ebindVD 45094 e2ebindALT 45111 stoweidlem57 46243 ovncvrrp 46750 ich2ex 47656 ichreuopeq 47661 reuopreuprim 47714 pgind 49904 |
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