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Mirrors > Home > ILE Home > Th. List > neli | GIF version |
Description: Inference associated with df-nel 2207. (Contributed by BJ, 7-Jul-2018.) |
Ref | Expression |
---|---|
neli.1 | ⊢ 𝐴 ∉ 𝐵 |
Ref | Expression |
---|---|
neli | ⊢ ¬ 𝐴 ∈ 𝐵 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | neli.1 | . 2 ⊢ 𝐴 ∉ 𝐵 | |
2 | df-nel 2207 | . 2 ⊢ (𝐴 ∉ 𝐵 ↔ ¬ 𝐴 ∈ 𝐵) | |
3 | 1, 2 | mpbi 133 | 1 ⊢ ¬ 𝐴 ∈ 𝐵 |
Colors of variables: wff set class |
Syntax hints: ¬ wn 3 ∈ wcel 1393 ∉ wnel 2205 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 |
This theorem depends on definitions: df-bi 110 df-nel 2207 |
This theorem is referenced by: renepnf 7073 renemnf 7074 xrltnr 8701 pnfnlt 8708 nltmnf 8709 |
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