![]() |
Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
|
Mirrors > Home > MPE Home > Th. List > fndm | Structured version Visualization version GIF version |
Description: The domain of a function. (Contributed by NM, 2-Aug-1994.) |
Ref | Expression |
---|---|
fndm | ⊢ (𝐹 Fn 𝐴 → dom 𝐹 = 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-fn 6504 | . 2 ⊢ (𝐹 Fn 𝐴 ↔ (Fun 𝐹 ∧ dom 𝐹 = 𝐴)) | |
2 | 1 | simprbi 497 | 1 ⊢ (𝐹 Fn 𝐴 → dom 𝐹 = 𝐴) |
Copyright terms: Public domain | W3C validator |