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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 6669 | . 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 7696 | . 2 ⊢ (1st ‘〈𝐴, 𝐵〉) = 𝐴 |
5 | 1, 4 | syl6eq 2872 | 1 ⊢ (𝐶 = 〈𝐴, 𝐵〉 → (1st ‘𝐶) = 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1533 ∈ wcel 2110 Vcvv 3494 〈cop 4572 ‘cfv 6354 1st c1st 7686 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2157 ax-12 2173 ax-ext 2793 ax-sep 5202 ax-nul 5209 ax-pow 5265 ax-pr 5329 ax-un 7460 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 df-sbc 3772 df-dif 3938 df-un 3940 df-in 3942 df-ss 3951 df-nul 4291 df-if 4467 df-sn 4567 df-pr 4569 df-op 4573 df-uni 4838 df-br 5066 df-opab 5128 df-mpt 5146 df-id 5459 df-xp 5560 df-rel 5561 df-cnv 5562 df-co 5563 df-dm 5564 df-rn 5565 df-iota 6313 df-fun 6356 df-fv 6362 df-1st 7688 |
This theorem is referenced by: 1st2val 7716 xp1st 7720 sbcopeq1a 7747 csbopeq1a 7748 eloprabi 7760 mpomptsx 7761 dmmpossx 7763 fmpox 7764 ovmptss 7787 fmpoco 7789 df1st2 7792 fsplit 7811 fsplitOLD 7812 frxp 7819 xporderlem 7820 fnwelem 7824 fimaproj 7828 xpf1o 8678 mapunen 8685 xpwdomg 9048 hsmexlem2 9848 fsumcom2 15128 fprodcom2 15337 qredeu 16001 isfuncd 17134 cofucl 17157 funcres2b 17166 funcpropd 17169 xpcco1st 17433 xpccatid 17437 1stf1 17441 2ndf1 17444 1stfcl 17446 prf1 17449 prfcl 17452 prf1st 17453 prf2nd 17454 evlf1 17469 evlfcl 17471 curf1fval 17473 curf11 17475 curf1cl 17477 curfcl 17481 hof1fval 17502 txbas 22174 cnmpt1st 22275 txhmeo 22410 ptuncnv 22414 ptunhmeo 22415 xpstopnlem1 22416 xkohmeo 22422 prdstmdd 22731 ucnimalem 22888 fmucndlem 22899 fsum2cn 23478 ovoliunlem1 24102 lgsquadlem1 25955 lgsquadlem2 25956 2sqreuop 26037 2sqreuopnn 26038 2sqreuoplt 26039 2sqreuopltb 26040 2sqreuopnnlt 26041 2sqreuopnnltb 26042 clwlkclwwlkfolem 27784 wlkl0 28145 eulerpartlemgs2 31638 hgt750lemb 31927 cvmliftlem15 32545 satfv1 32610 satfdmlem 32615 fmlasuc 32633 msubty 32774 msubco 32778 msubvrs 32807 filnetlem4 33729 finixpnum 34876 poimirlem4 34895 poimirlem15 34906 poimirlem20 34911 poimirlem26 34917 poimirlem28 34919 heicant 34926 dicelvalN 38313 rmxypairf1o 39506 unxpwdom3 39693 fgraphxp 39809 elcnvlem 39959 dvnprodlem2 42230 etransclem46 42564 ovnsubaddlem1 42851 dmmpossx2 44384 rrx2plordisom 44709 |
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