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Mirrors > Home > MPE Home > Th. List > f1ofn | Structured version Visualization version GIF version |
Description: A one-to-one onto mapping is function on its domain. (Contributed by NM, 12-Dec-2003.) |
Ref | Expression |
---|---|
f1ofn | ⊢ (𝐹:𝐴–1-1-onto→𝐵 → 𝐹 Fn 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | f1of 6716 | . 2 ⊢ (𝐹:𝐴–1-1-onto→𝐵 → 𝐹:𝐴⟶𝐵) | |
2 | 1 | ffnd 6601 | 1 ⊢ (𝐹:𝐴–1-1-onto→𝐵 → 𝐹 Fn 𝐴) |
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