| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > nfcv | Structured version Visualization version GIF version | ||
| Description: If 𝑥 is disjoint from 𝐴, then 𝑥 is not free in 𝐴. (Contributed by Mario Carneiro, 11-Aug-2016.) |
| Ref | Expression |
|---|---|
| nfcv | ⊢ Ⅎ𝑥𝐴 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nfv 1843 | . 2 ⊢ Ⅎ𝑥 𝑦 ∈ 𝐴 | |
| 2 | 1 | nfci 2754 | 1 ⊢ Ⅎ𝑥𝐴 |
| Copyright terms: Public domain | W3C validator |