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| Mirrors > Home > ILE Home > Th. List > f1of | Unicode version | ||
| Description: A one-to-one onto mapping is a mapping. (Contributed by NM, 12-Dec-2003.) |
| Ref | Expression |
|---|---|
| f1of |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | f1of1 5503 |
. 2
| |
| 2 | f1f 5463 |
. 2
| |
| 3 | 1, 2 | syl 14 |
1
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