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Mirrors > Home > ILE Home > Th. List > fveq2i | GIF version |
Description: Equality inference for function value. (Contributed by NM, 28-Jul-1999.) |
Ref | Expression |
---|---|
fveq2i.1 | ⊢ 𝐴 = 𝐵 |
Ref | Expression |
---|---|
fveq2i | ⊢ (𝐹‘𝐴) = (𝐹‘𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fveq2i.1 | . 2 ⊢ 𝐴 = 𝐵 | |
2 | fveq2 5496 | . 2 ⊢ (𝐴 = 𝐵 → (𝐹‘𝐴) = (𝐹‘𝐵)) | |
3 | 1, 2 | ax-mp 5 | 1 ⊢ (𝐹‘𝐴) = (𝐹‘𝐵) |
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