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Mirrors > Home > MPE Home > Th. List > nfel1 | Structured version Visualization version GIF version |
Description: Hypothesis builder for elementhood, special case. (Contributed by Mario Carneiro, 10-Oct-2016.) |
Ref | Expression |
---|---|
nfeq1.1 | ⊢ Ⅎ𝑥𝐴 |
Ref | Expression |
---|---|
nfel1 | ⊢ Ⅎ𝑥 𝐴 ∈ 𝐵 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfeq1.1 | . 2 ⊢ Ⅎ𝑥𝐴 | |
2 | nfcv 2906 | . 2 ⊢ Ⅎ𝑥𝐵 | |
3 | 1, 2 | nfel 2920 | 1 ⊢ Ⅎ𝑥 𝐴 ∈ 𝐵 |
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