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| Mirrors > Home > MPE Home > Th. List > elmapi | Structured version Visualization version Unicode version | ||
| Description: A mapping is a function, forward direction only with superfluous antecedent removed. (Contributed by Stefan O'Rear, 10-Oct-2014.) |
| Ref | Expression |
|---|---|
| elmapi |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elmapex 7878 |
. . 3
| |
| 2 | elmapg 7870 |
. . 3
| |
| 3 | 1, 2 | syl 17 |
. 2
|
| 4 | 3 | ibi 256 |
1
|
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