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Mirrors > Home > MPE Home > Th. List > fnfun | Structured version Visualization version GIF version |
Description: A function with domain is a function. (Contributed by NM, 1-Aug-1994.) |
Ref | Expression |
---|---|
fnfun | ⊢ (𝐹 Fn 𝐴 → Fun 𝐹) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-fn 6440 | . 2 ⊢ (𝐹 Fn 𝐴 ↔ (Fun 𝐹 ∧ dom 𝐹 = 𝐴)) | |
2 | 1 | simplbi 498 | 1 ⊢ (𝐹 Fn 𝐴 → Fun 𝐹) |
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