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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 2516 | . 2 ⊢ (∀𝑥 ∈ 𝐴 𝜑 ↔ ∀𝑥(𝑥 ∈ 𝐴 → 𝜑)) | |
| 2 | nfa1 1590 | . 2 ⊢ Ⅎ𝑥∀𝑥(𝑥 ∈ 𝐴 → 𝜑) | |
| 3 | 1, 2 | nfxfr 1523 | 1 ⊢ Ⅎ𝑥∀𝑥 ∈ 𝐴 𝜑 |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∀wal 1396 Ⅎwnf 1509 ∈ wcel 2202 ∀wral 2511 |
| 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 1496 ax-gen 1498 ax-ial 1583 |
| This theorem depends on definitions: df-bi 117 df-nf 1510 df-ral 2516 |
| This theorem is referenced by: nfra2xy 2575 r19.12 2640 ralbi 2666 rexbi 2667 nfss 3221 ralidm 3597 nfii1 4006 dfiun2g 4007 mpteq12f 4174 reusv1 4561 ralxfrALT 4570 peano2 4699 fun11iun 5613 fvmptssdm 5740 ffnfv 5813 riota5f 6008 mpoeq123 6090 tfri3 6576 nfixp1 6930 nneneq 7086 exmidomni 7384 mkvprop 7400 caucvgsrlemgt1 8058 suplocsrlem 8071 lble 9169 indstr 9871 zsupcllemstep 10535 nninfinf 10751 fimaxre2 11850 prodeq2 12181 bezoutlemmain 12632 bezoutlemzz 12636 exmidunben 13110 mulcncf 15402 limccnp2cntop 15471 bj-rspgt 16487 isomninnlem 16745 iswomninnlem 16765 ismkvnnlem 16768 |
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