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Mirrors > Home > MPE Home > Th. List > op1std | Structured version Visualization version GIF version |
Description: Extract the first member of an ordered pair. (Contributed by Mario Carneiro, 31-Aug-2015.) |
Ref | Expression |
---|---|
op1st.1 | ⊢ 𝐴 ∈ V |
op1st.2 | ⊢ 𝐵 ∈ V |
Ref | Expression |
---|---|
op1std | ⊢ (𝐶 = 〈𝐴, 𝐵〉 → (1st ‘𝐶) = 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fveq2 6645 | . 2 ⊢ (𝐶 = 〈𝐴, 𝐵〉 → (1st ‘𝐶) = (1st ‘〈𝐴, 𝐵〉)) | |
2 | op1st.1 | . . 3 ⊢ 𝐴 ∈ V | |
3 | op1st.2 | . . 3 ⊢ 𝐵 ∈ V | |
4 | 2, 3 | op1st 7679 | . 2 ⊢ (1st ‘〈𝐴, 𝐵〉) = 𝐴 |
5 | 1, 4 | eqtrdi 2849 | 1 ⊢ (𝐶 = 〈𝐴, 𝐵〉 → (1st ‘𝐶) = 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1538 ∈ wcel 2111 Vcvv 3441 〈cop 4531 ‘cfv 6324 1st c1st 7669 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 ax-sep 5167 ax-nul 5174 ax-pow 5231 ax-pr 5295 ax-un 7441 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ral 3111 df-rex 3112 df-rab 3115 df-v 3443 df-sbc 3721 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-nul 4244 df-if 4426 df-sn 4526 df-pr 4528 df-op 4532 df-uni 4801 df-br 5031 df-opab 5093 df-mpt 5111 df-id 5425 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-iota 6283 df-fun 6326 df-fv 6332 df-1st 7671 |
This theorem is referenced by: 1st2val 7699 xp1st 7703 sbcopeq1a 7730 csbopeq1a 7731 eloprabi 7743 mpomptsx 7744 dmmpossx 7746 fmpox 7747 ovmptss 7771 fmpoco 7773 df1st2 7776 fsplit 7795 fsplitOLD 7796 frxp 7803 xporderlem 7804 fnwelem 7808 fimaproj 7812 xpf1o 8663 mapunen 8670 xpwdomg 9033 hsmexlem2 9838 fsumcom2 15121 fprodcom2 15330 qredeu 15992 isfuncd 17127 cofucl 17150 funcres2b 17159 funcpropd 17162 xpcco1st 17426 xpccatid 17430 1stf1 17434 2ndf1 17437 1stfcl 17439 prf1 17442 prfcl 17445 prf1st 17446 prf2nd 17447 evlf1 17462 evlfcl 17464 curf1fval 17466 curf11 17468 curf1cl 17470 curfcl 17474 hof1fval 17495 txbas 22172 cnmpt1st 22273 txhmeo 22408 ptuncnv 22412 ptunhmeo 22413 xpstopnlem1 22414 xkohmeo 22420 prdstmdd 22729 ucnimalem 22886 fmucndlem 22897 fsum2cn 23476 ovoliunlem1 24106 lgsquadlem1 25964 lgsquadlem2 25965 2sqreuop 26046 2sqreuopnn 26047 2sqreuoplt 26048 2sqreuopltb 26049 2sqreuopnnlt 26050 2sqreuopnnltb 26051 clwlkclwwlkfolem 27792 wlkl0 28152 gsumhashmul 30741 eulerpartlemgs2 31748 hgt750lemb 32037 cvmliftlem15 32658 satfv1 32723 satfdmlem 32728 fmlasuc 32746 msubty 32887 msubco 32891 msubvrs 32920 filnetlem4 33842 finixpnum 35042 poimirlem4 35061 poimirlem15 35072 poimirlem20 35077 poimirlem26 35083 poimirlem28 35085 heicant 35092 dicelvalN 38474 rmxypairf1o 39852 unxpwdom3 40039 fgraphxp 40155 elcnvlem 40301 dvnprodlem2 42589 etransclem46 42922 ovnsubaddlem1 43209 dmmpossx2 44738 2arymaptf 45066 rrx2plordisom 45137 |
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