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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 2147 | . 2 ⊢ (∃𝑥𝜑 → ∀𝑥∃𝑥𝜑) | |
2 | 1 | nf5i 2150 | 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 2145 |
This theorem depends on definitions: df-bi 209 df-ex 1781 df-nf 1785 |
This theorem is referenced by: nfa1 2155 nfnf1 2158 nf6 2291 exdistrf 2469 nfeu1ALT 2675 euor2 2697 2moexv 2712 moexexvw 2713 2moswapv 2714 2euexv 2716 eupicka 2719 mopick2 2722 moexex 2723 2moex 2725 2euex 2726 2moswap 2729 2mo 2733 2eu7 2743 2eu8 2744 nfre1 3308 ceqsexg 3648 morex 3712 intab 4908 nfopab1 5137 nfopab2 5138 axrep1 5193 axrep2 5195 axrep3 5196 axrep4 5197 eusv2nf 5298 copsexgw 5383 copsexg 5384 copsex2t 5385 copsex2g 5386 mosubopt 5402 dfid3 5464 dmcoss 5844 imadif 6440 oprabidw 7189 nfoprab1 7217 nfoprab2 7218 nfoprab3 7219 fsplitOLD 7815 zfcndrep 10038 zfcndpow 10040 zfcndreg 10041 zfcndinf 10042 reclem2pr 10472 ex-natded9.26 28200 brabgaf 30361 bnj607 32190 bnj849 32199 bnj1398 32308 bnj1449 32322 finminlem 33668 exisym1 33774 bj-alexbiex 34035 bj-exexbiex 34036 bj-biexal2 34042 bj-biexex 34045 bj-sbf3 34164 copsex2d 34433 sbexi 35393 ac6s6 35452 e2ebind 40904 e2ebindVD 41253 e2ebindALT 41270 stoweidlem57 42349 ovncvrrp 42853 ich2ex 43636 ichreuopeq 43642 reuopreuprim 43695 |
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