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Mirrors > Home > MPE Home > Th. List > fvresd | Structured version Visualization version GIF version |
Description: The value of a restricted function, deduction version of fvres 6793. (Contributed by Glauco Siliprandi, 8-Apr-2021.) |
Ref | Expression |
---|---|
fvresd.1 | ⊢ (𝜑 → 𝐴 ∈ 𝐵) |
Ref | Expression |
---|---|
fvresd | ⊢ (𝜑 → ((𝐹 ↾ 𝐵)‘𝐴) = (𝐹‘𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fvresd.1 | . 2 ⊢ (𝜑 → 𝐴 ∈ 𝐵) | |
2 | fvres 6793 | . 2 ⊢ (𝐴 ∈ 𝐵 → ((𝐹 ↾ 𝐵)‘𝐴) = (𝐹‘𝐴)) | |
3 | 1, 2 | syl 17 | 1 ⊢ (𝜑 → ((𝐹 ↾ 𝐵)‘𝐴) = (𝐹‘𝐴)) |
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