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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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