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Mirrors > Home > MPE Home > Th. List > op1stg | Structured version Visualization version GIF version |
Description: Extract the first member of an ordered pair. (Contributed by NM, 19-Jul-2005.) |
Ref | Expression |
---|---|
op1stg | ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (1st ‘〈𝐴, 𝐵〉) = 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | opeq1 4877 | . . . 4 ⊢ (𝑥 = 𝐴 → 〈𝑥, 𝑦〉 = 〈𝐴, 𝑦〉) | |
2 | 1 | fveq2d 6910 | . . 3 ⊢ (𝑥 = 𝐴 → (1st ‘〈𝑥, 𝑦〉) = (1st ‘〈𝐴, 𝑦〉)) |
3 | id 22 | . . 3 ⊢ (𝑥 = 𝐴 → 𝑥 = 𝐴) | |
4 | 2, 3 | eqeq12d 2750 | . 2 ⊢ (𝑥 = 𝐴 → ((1st ‘〈𝑥, 𝑦〉) = 𝑥 ↔ (1st ‘〈𝐴, 𝑦〉) = 𝐴)) |
5 | opeq2 4878 | . . 3 ⊢ (𝑦 = 𝐵 → 〈𝐴, 𝑦〉 = 〈𝐴, 𝐵〉) | |
6 | 5 | fveqeq2d 6914 | . 2 ⊢ (𝑦 = 𝐵 → ((1st ‘〈𝐴, 𝑦〉) = 𝐴 ↔ (1st ‘〈𝐴, 𝐵〉) = 𝐴)) |
7 | vex 3481 | . . 3 ⊢ 𝑥 ∈ V | |
8 | vex 3481 | . . 3 ⊢ 𝑦 ∈ V | |
9 | 7, 8 | op1st 8020 | . 2 ⊢ (1st ‘〈𝑥, 𝑦〉) = 𝑥 |
10 | 4, 6, 9 | vtocl2g 3573 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (1st ‘〈𝐴, 𝐵〉) = 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 = wceq 1536 ∈ wcel 2105 〈cop 4636 ‘cfv 6562 1st c1st 8010 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1791 ax-4 1805 ax-5 1907 ax-6 1964 ax-7 2004 ax-8 2107 ax-9 2115 ax-10 2138 ax-11 2154 ax-12 2174 ax-ext 2705 ax-sep 5301 ax-nul 5311 ax-pr 5437 ax-un 7753 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1539 df-fal 1549 df-ex 1776 df-nf 1780 df-sb 2062 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2726 df-clel 2813 df-nfc 2889 df-ral 3059 df-rex 3068 df-rab 3433 df-v 3479 df-dif 3965 df-un 3967 df-in 3969 df-ss 3979 df-nul 4339 df-if 4531 df-sn 4631 df-pr 4633 df-op 4637 df-uni 4912 df-br 5148 df-opab 5210 df-mpt 5231 df-id 5582 df-xp 5694 df-rel 5695 df-cnv 5696 df-co 5697 df-dm 5698 df-rn 5699 df-iota 6515 df-fun 6564 df-fv 6570 df-1st 8012 |
This theorem is referenced by: ot1stg 8026 ot2ndg 8027 br1steqg 8034 1stconst 8123 mposn 8126 curry2 8130 opco1 8146 mpoxopn0yelv 8236 mpoxopoveq 8242 xpmapenlem 9182 1stinl 9964 1stinr 9966 fpwwe 10683 addpipq 10974 mulpipq 10977 ordpipq 10979 swrdval 14677 ruclem1 16263 qnumdenbi 16777 setsstruct 17209 oppccofval 17761 funcf2 17918 cofuval2 17937 resfval2 17943 resf1st 17944 isnat 18001 fucco 18018 homadm 18093 setcco 18136 estrcco 18184 xpcco 18238 xpchom2 18241 xpcco2 18242 evlf2 18274 curfval 18279 curf1cl 18284 uncf1 18292 uncf2 18293 diag11 18299 diag12 18300 diag2 18301 hof2fval 18311 yonedalem21 18329 yonedalem22 18334 mvmulfval 22563 imasdsf1olem 24398 ovolicc1 25564 ioombl1lem3 25608 ioombl1lem4 25609 addsqnreup 27501 addsval 28009 mulsval 28149 brcgr 28929 opvtxfv 29035 fgreu 32688 fsuppcurry2 32743 erlbrd 33249 rlocaddval 33254 rlocmulval 33255 fracerl 33287 sategoelfvb 35403 prv1n 35415 fvtransport 36013 bj-inftyexpiinv 37190 bj-finsumval0 37267 poimirlem17 37623 poimirlem24 37630 poimirlem27 37633 rngoablo2 37895 dvhopvadd 41075 dvhopvsca 41084 dvhopaddN 41096 dvhopspN 41097 etransclem44 46233 ovnsubaddlem1 46525 ovnlecvr2 46565 ovolval5lem2 46608 rngccoALTV 48114 ringccoALTV 48148 |
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