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 ) |