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Mirrors > Home > MPE Home > Th. List > difssd | Structured version Visualization version GIF version |
Description: A difference of two classes is contained in the minuend. Deduction form of difss 4067. (Contributed by David Moews, 1-May-2017.) |
Ref | Expression |
---|---|
difssd | ⊢ (𝜑 → (𝐴 ∖ 𝐵) ⊆ 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | difss 4067 | . 2 ⊢ (𝐴 ∖ 𝐵) ⊆ 𝐴 | |
2 | 1 | a1i 11 | 1 ⊢ (𝜑 → (𝐴 ∖ 𝐵) ⊆ 𝐴) |
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