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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 | 
 | 
| op1st.2 | 
 | 
| Ref | Expression | 
|---|---|
| op2nd | 
 | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | op1st.1 | 
. . . 4
 | |
| 2 | op1st.2 | 
. . . 4
 | |
| 3 | opexg 4261 | 
. . . 4
 | |
| 4 | 1, 2, 3 | mp2an 426 | 
. . 3
 | 
| 5 | 2ndvalg 6201 | 
. . 3
 | |
| 6 | 4, 5 | ax-mp 5 | 
. 2
 | 
| 7 | 1, 2 | op2nda 5154 | 
. 2
 | 
| 8 | 6, 7 | eqtri 2217 | 
1
 | 
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