Description: Constant function with loose range. (Contributed by Stefan O'Rear, 1-Feb-2015)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | fconst6g | ⊢ ( 𝐵 ∈ 𝐶 → ( 𝐴 × { 𝐵 } ) : 𝐴 ⟶ 𝐶 ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fconstg | ⊢ ( 𝐵 ∈ 𝐶 → ( 𝐴 × { 𝐵 } ) : 𝐴 ⟶ { 𝐵 } ) | |
| 2 | snssi | ⊢ ( 𝐵 ∈ 𝐶 → { 𝐵 } ⊆ 𝐶 ) | |
| 3 | 1 2 | fssd | ⊢ ( 𝐵 ∈ 𝐶 → ( 𝐴 × { 𝐵 } ) : 𝐴 ⟶ 𝐶 ) |