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Mirrors > Home > MPE Home > Th. List > opelxpi | Structured version Visualization version Unicode version |
Description: Ordered pair membership in a Cartesian product (implication). (Contributed by NM, 28-May-1995.) |
Ref | Expression |
---|---|
opelxpi |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | opelxp 5146 |
. 2
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2 | 1 | biimpri 218 |
1
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