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| Mirrors > Home > MPE Home > Th. List > f1f | Structured version Visualization version Unicode version | ||
| Description: A one-to-one mapping is a mapping. (Contributed by NM, 31-Dec-1996.) |
| Ref | Expression |
|---|---|
| f1f |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-f1 5893 |
. 2
| |
| 2 | 1 | simplbi 476 |
1
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