Metamath Proof Explorer
Description: Ordered pair membership in a Cartesian product (implication).
(Contributed by Steven Nguyen, 17-Jul-2022)
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Ref |
Expression |
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Hypotheses |
opelxpii.1 |
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opelxpii.2 |
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Assertion |
opelxpii |
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Proof
Step |
Hyp |
Ref |
Expression |
1 |
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opelxpii.1 |
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2 |
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opelxpii.2 |
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3 |
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opelxpi |
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4 |
1 2 3
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mp2an |
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