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| Description: Extract the first member of an ordered pair. |
| Ref | Expression |
|---|---|
| op1st.1 |
|
| Ref | Expression |
|---|---|
| op1st |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 1stval 5022 |
. 2
| |
| 2 | op1st.1 |
. . 3
| |
| 3 | 2 | op1sta 4372 |
. 2
|
| 4 | 1, 3 | eqtri 1908 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: op1stg 5028 1stval2 5030 fo1stres 5036 1st2val 5038 sbcopeq1a 5051 csbopeq1a 5052 dfopab2 5053 dfoprab3 5054 dfoprab5s 5057 df1st2 5068 1stconst 5070 curry2 5078 fparlem1 5081 fsplit 5086 seq1lem1 7722 ruclem16 8794 ruclem18 8796 ruclem20 8798 xplmi 9251 xplm 9253 xpcn 9254 bcthlem32 9308 nvvcop 9545 nvoprne 9638 cnnvg 9640 cnnvs 9643 xp1st 10155 oprabopabf 10157 upxp 10225 uptx 10226 txcnopab 10228 fora1 10406 on1el3 10412 on1el4 10413 h2hva 10475 h2hsm 10476 hhssva 10762 hhsssm 10763 hhshsslem1 10770 hhsssh2 10773 mulgcdlem2 13757 xporderlem 13948 frxp 13951 prj1 14395 eloi 14400 mulveczer 14822 mulinvsca 14823 muldisc 14824 svli2 14826 2ndcctbss 15478 filnetlem5 15644 filnet 15645 cnoprab1 15921 txmet 15925 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 1304 ax-gen 1305 ax-8 1306 ax-9 1307 ax-10 1308 ax-11 1309 ax-12 1310 ax-13 1311 ax-14 1312 ax-17 1317 ax-4 1319 ax-5o 1321 ax-6o 1324 ax-9o 1481 ax-10o 1500 ax-16 1580 ax-11o 1588 ax-ext 1865 ax-sep 3438 ax-nul 3445 ax-pow 3481 ax-pr 3524 ax-un 3790 |
| This theorem depends on definitions: df-bi 164 df-or 241 df-an 242 df-ex 1327 df-sb 1536 df-eu 1775 df-mo 1776 df-clab 1872 df-cleq 1877 df-clel 1880 df-ne 2019 df-ral 2109 df-rex 2110 df-v 2294 df-dif 2597 df-un 2600 df-in 2603 df-ss 2605 df-nul 2876 df-pw 3035 df-sn 3049 df-pr 3050 df-op 3053 df-uni 3178 df-br 3339 df-opab 3396 df-id 3586 df-xp 4000 df-rel 4001 df-cnv 4002 df-co 4003 df-dm 4004 df-rn 4005 df-res 4006 df-ima 4007 df-fun 4008 df-fv 4014 df-1st 5020 |