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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 2149 | . 2 ⊢ (∃𝑥𝜑 → ∀𝑥∃𝑥𝜑) | |
| 2 | 1 | nf5i 2152 | 1 ⊢ Ⅎ𝑥∃𝑥𝜑 |
| Colors of variables: wff setvar class |
| Syntax hints: ∃wex 1781 Ⅎwnf 1785 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-10 2147 |
| This theorem depends on definitions: df-bi 207 df-ex 1782 df-nf 1786 |
| This theorem is referenced by: nfa1 2157 nfnf1 2160 sbalex 2250 nf6 2290 exdistrf 2452 nfeu1 2590 euor2 2614 2moexv 2628 moexexvw 2629 2moswapv 2630 2euexv 2632 eupicka 2635 mopick2 2638 moexex 2639 2moex 2641 2euex 2642 2moswap 2645 2mo 2649 2eu7 2659 2eu8 2660 nfre1 3263 ceqsexg 3596 morex 3666 intab 4921 nfopab1 5156 nfopab2 5157 axrep1 5214 axrep2 5216 axrep3 5217 axrep4OLD 5220 eusv2nf 5333 copsexgw 5439 copsexg 5440 copsex2t 5441 mosubopt 5459 dfid3 5523 dmcossOLD 5926 imadif 6577 oprabidw 7392 nfoprab1 7422 nfoprab2 7423 nfoprab3 7424 zfcndrep 10531 zfcndpow 10533 zfcndreg 10534 zfcndinf 10535 reclem2pr 10965 ex-natded9.26 30507 brabgaf 32697 bnj607 35077 bnj849 35086 bnj1398 35195 bnj1449 35209 finminlem 36519 exisym1 36625 bj-alexbiex 37015 bj-exexbiex 37016 bj-biexal2 37022 bj-biexex 37025 bj-sbf3 37165 bj-axseprep 37400 bj-axreprepsep 37401 copsex2d 37472 sbexi 38451 ac6s6 38510 nfe2 42671 e2ebind 45011 e2ebindVD 45359 e2ebindALT 45376 stoweidlem57 46506 ovncvrrp 47013 ich2ex 47943 ichreuopeq 47948 reuopreuprim 48001 pgind 50207 |
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