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Mirrors > Home > MPE Home > Th. List > mpteq2i | Structured version Visualization version GIF version |
Description: An equality inference for the maps-to notation. (Contributed by Mario Carneiro, 16-Dec-2013.) |
Ref | Expression |
---|---|
mpteq2i.1 | ⊢ 𝐵 = 𝐶 |
Ref | Expression |
---|---|
mpteq2i | ⊢ (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑥 ∈ 𝐴 ↦ 𝐶) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | mpteq2i.1 | . . 3 ⊢ 𝐵 = 𝐶 | |
2 | 1 | a1i 11 | . 2 ⊢ (𝑥 ∈ 𝐴 → 𝐵 = 𝐶) |
3 | 2 | mpteq2ia 5173 | 1 ⊢ (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑥 ∈ 𝐴 ↦ 𝐶) |
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