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Mirrors > Home > ILE Home > Th. List > op2nd | Unicode version |
Description: Extract the second member of an ordered pair. (Contributed by NM, 5-Oct-2004.) |
Ref | Expression |
---|---|
op1st.1 |
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op1st.2 |
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Ref | Expression |
---|---|
op2nd |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | op1st.1 |
. . . 4
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2 | op1st.2 |
. . . 4
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3 | opexg 4158 |
. . . 4
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4 | 1, 2, 3 | mp2an 423 |
. . 3
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5 | 2ndvalg 6049 |
. . 3
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6 | 4, 5 | ax-mp 5 |
. 2
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7 | 1, 2 | op2nda 5031 |
. 2
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8 | 6, 7 | eqtri 2161 |
1
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