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Mirrors > Home > ILE Home > Th. List > opeq12d | Unicode version |
Description: Equality deduction for ordered pairs. (Contributed by NM, 16-Dec-2006.) (Proof shortened by Andrew Salmon, 29-Jun-2011.) |
Ref | Expression |
---|---|
opeq1d.1 |
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opeq12d.2 |
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Ref | Expression |
---|---|
opeq12d |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | opeq1d.1 |
. 2
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2 | opeq12d.2 |
. 2
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3 | opeq12 3780 |
. 2
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4 | 1, 2, 3 | syl2anc 411 |
1
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