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| Description: Extract the second member of an ordered pair. (See op1sta 3444 to extract the first member, op2ndb 3447 for an alternate version, and op2nd 4079 for the preferred version.) |
| Ref | Expression |
|---|---|
| cnvsn.1 |
|
| cnvsn.2 |
|
| Ref | Expression |
|---|---|
| op2nda |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-rn 3185 |
. . . 4
| |
| 2 | cnvsn.1 |
. . . . . 6
| |
| 3 | cnvsn.2 |
. . . . . 6
| |
| 4 | 2, 3 | cnvsn 3445 |
. . . . 5
|
| 5 | 4 | dmeqi 3308 |
. . . 4
|
| 6 | 1, 5 | eqtr 1493 |
. . 3
|
| 7 | 6 | unieqi 2507 |
. 2
|
| 8 | 3 | op1sta 3444 |
. 2
|
| 9 | 7, 8 | eqtr 1493 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: elxp4 3449 elxp5 3450 op2nd 4079 fo2nd 4085 f2ndres 4087 xpassen 4430 xpdom2 4431 xpmapenlem2 4486 xpmapenlem4 4488 xpmapenlem5 4489 mapunen 4491 xpnnen 7458 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 961 ax-gen 962 ax-8 963 ax-10 965 ax-11 966 ax-12 967 ax-13 968 ax-14 969 ax-17 970 ax-4 972 ax-5o 974 ax-6o 977 ax-9o 1122 ax-10o 1139 ax-16 1209 ax-11o 1217 ax-ext 1458 ax-sep 2699 ax-nul 2706 ax-pow 2738 ax-pr 2775 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 980 df-sb 1171 df-eu 1381 df-mo 1382 df-clab 1463 df-cleq 1468 df-clel 1471 df-ne 1585 df-v 1809 df-dif 2046 df-un 2047 df-in 2048 df-ss 2050 df-nul 2278 df-pw 2399 df-sn 2409 df-pr 2410 df-op 2413 df-uni 2500 df-br 2616 df-opab 2663 df-xp 3180 df-rel 3181 df-cnv 3182 df-dm 3184 df-rn 3185 |