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| Mirrors > Home > ILE Home > Th. List > nfra1 | GIF version | ||
| Description: 𝑥 is not free in ∀𝑥 ∈ 𝐴𝜑. (Contributed by NM, 18-Oct-1996.) (Revised by Mario Carneiro, 7-Oct-2016.) |
| Ref | Expression |
|---|---|
| nfra1 | ⊢ Ⅎ𝑥∀𝑥 ∈ 𝐴 𝜑 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-ral 2533 | . 2 ⊢ (∀𝑥 ∈ 𝐴 𝜑 ↔ ∀𝑥(𝑥 ∈ 𝐴 → 𝜑)) | |
| 2 | nfa1 1594 | . 2 ⊢ Ⅎ𝑥∀𝑥(𝑥 ∈ 𝐴 → 𝜑) | |
| 3 | 1, 2 | nfxfr 1527 | 1 ⊢ Ⅎ𝑥∀𝑥 ∈ 𝐴 𝜑 |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∀wal 1400 Ⅎwnf 1513 ∈ wcel 2209 ∀wral 2528 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1500 ax-gen 1502 ax-ial 1587 |
| This theorem depends on definitions: df-bi 117 df-nf 1514 df-ral 2533 |
| This theorem is referenced by: nfra2xy 2592 r19.12 2657 ralbi 2683 rexbi 2684 nfss 3241 ralidm 3625 nfii1 4038 dfiun2g 4039 mpteq12f 4206 reusv1 4599 ralxfrALT 4608 peano2 4737 fun11iun 5655 fvmptssdm 5784 ffnfv 5857 riota5f 6055 mpoeq123 6137 abrexss 6348 tfri3 6628 nfixp1 6990 nneneq 7148 exmidomni 7472 mkvprop 7488 caucvgsrlemgt1 8152 suplocsrlem 8165 lble 9267 indstr 9972 zsupcllemstep 10640 nninfinf 10858 fimaxre2 11971 prodeq2 12302 bezoutlemmain 12753 bezoutlemzz 12757 exmidunben 13295 mulcncf 15632 limccnp2cntop 15701 bj-rspgt 16728 isomninnlem 16984 iswomninnlem 17004 ismkvnnlem 17007 |
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