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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 2178 | . 2 ⊢ (∃𝑥𝜑 → ∀𝑥∃𝑥𝜑) | |
| 2 | 1 | nf5i 2181 | 1 ⊢ Ⅎ𝑥∃𝑥𝜑 |
| Colors of variables: wff setvar class |
| Syntax hints: ∃wex 1809 Ⅎwnf 1813 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-10 2176 |
| This theorem depends on definitions: df-bi 210 df-ex 1810 df-nf 1814 |
| This theorem is referenced by: nfa1 2186 nfnf1 2189 sbalex 2278 nf6 2318 exdistrf 2479 nfeu1 2617 euor2 2641 2moexv 2655 moexexvw 2656 2moswapv 2657 2euexv 2659 eupicka 2662 mopick2 2665 moexex 2666 2moex 2668 2euex 2669 2moswap 2672 2mo 2676 2eu7 2685 2eu8 2686 nfre1 3290 ceqsexg 3612 morex 3682 intab 4943 nfopab1 5181 nfopab2 5182 axrep1 5239 axrep2 5241 axrep3 5242 axrep4OLD 5245 eusv2nf 5366 copsexgwOLD 5473 copsexg 5474 copsex2t 5475 mosubopt 5493 dfid3 5559 dmcossOLD 5966 imadif 6620 oprabidw 7441 nfoprab1 7471 nfoprab2 7472 nfoprab3 7473 zfcndrep 10594 zfcndpow 10596 zfcndreg 10597 zfcndinf 10598 reclem2pr 11028 ex-natded9.26 30770 brabgaf 32951 bnj607 35304 bnj849 35313 bnj1398 35422 bnj1449 35436 finminlem 36829 exisym1 36935 bj-alexbiex 37324 bj-exexbiex 37325 bj-biexal2 37331 bj-biexex 37334 bj-sbf3 37474 bj-axseprep 37711 bj-axreprepsep 37712 copsex2d 37783 sbexi 38762 ac6s6 38821 nfe2 42984 e2ebind 45272 e2ebindVD 45620 e2ebindALT 45637 stoweidlem57 46771 ovncvrrp 47278 ich2ex 48217 ichreuopeq 48222 reuopreuprim 48275 pgind 50495 |
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