| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > op1st | Structured version Visualization version GIF version | ||
| Description: Extract the first member of an ordered pair. (Contributed by NM, 5-Oct-2004.) |
| Ref | Expression |
|---|---|
| op1st.1 | ⊢ 𝐴 ∈ V |
| op1st.2 | ⊢ 𝐵 ∈ V |
| Ref | Expression |
|---|---|
| op1st | ⊢ (1st ‘〈𝐴, 𝐵〉) = 𝐴 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 1stval 8037 | . 2 ⊢ (1st ‘〈𝐴, 𝐵〉) = ∪ dom {〈𝐴, 𝐵〉} | |
| 2 | op1st.1 | . . 3 ⊢ 𝐴 ∈ V | |
| 3 | op1st.2 | . . 3 ⊢ 𝐵 ∈ V | |
| 4 | 2, 3 | op1sta 6245 | . 2 ⊢ ∪ dom {〈𝐴, 𝐵〉} = 𝐴 |
| 5 | 1, 4 | eqtri 2786 | 1 ⊢ (1st ‘〈𝐴, 𝐵〉) = 𝐴 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 ∈ wcel 2147 Vcvv 3454 {csn 4588 〈cop 4840 ∪ cuni 4872 dom cdm 5658 ‘cfv 6566 1st c1st 8033 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5255 ax-nul 5266 ax-pr 5398 ax-un 7783 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4841 df-uni 4873 df-br 5109 df-opab 5174 df-mpt 5193 df-id 5553 df-xp 5664 df-rel 5665 df-cnv 5666 df-co 5667 df-dm 5668 df-rn 5669 df-iota 6520 df-fun 6568 df-fv 6574 df-1st 8035 |
| This theorem is used by: op1std 8045 op1stg 8047 1stval2 8052 fo1stres 8061 opreuopreu 8080 eloprabi 8109 xpmapenlem 9201 fseqenlem2 10143 archnq 11104 ruclem8 16449 idfu1st 18104 cofu1st 18108 xpccatid 18412 prf1st 18428 yonedalem21 18497 yonedalem22 18502 2ndcctbss 23829 upxp 23997 uptx 23999 cnheiborlem 25330 ovollb2lem 25864 ovolctb 25866 ovoliunlem2 25879 ovolshftlem1 25885 ovolscalem1 25889 ovolicc1 25892 addsqnreup 27827 2sqreuop 27846 2sqreuopnn 27847 2sqreuoplt 27848 2sqreuopltb 27849 2sqreuopnnlt 27850 2sqreuopnnltb 27851 precsexlem1 28650 precsexlem4 28653 ex-1st 31102 cnnvg 31337 cnnvs 31339 h2hva 31633 h2hsm 31634 hhssva 31916 hhsssm 31917 hhshsslem1 31926 gsumhashmul 33727 rlocf1 33934 fracfld 33974 eulerpartlemgvv 35119 eulerpartlemgh 35121 satfv0fvfmla0 36386 filnetlem3 37383 poimirlem17 38823 heiborlem8 39018 dvhvaddass 42420 dvhlveclem 42431 diblss 42493 aks6d1c3 43439 pellexlem5 44106 pellex 44108 dvnprodlem1 47229 hoicvr 47831 hoicvrrex 47839 ovn0lem 47848 ovnhoilem1 47884 gpgedgvtx0 49432 gpgedgvtx1 49433 gpg3kgrtriex 49460 pgnioedg1 49479 pgnioedg2 49480 pgnioedg3 49481 pgnioedg4 49482 pgnioedg5 49483 pgnbgreunbgrlem2lem1 49485 pgnbgreunbgrlem2lem2 49486 pgnbgreunbgrlem2lem3 49487 pgnbgreunbgrlem5lem1 49491 pgnbgreunbgrlem5lem2 49492 pgnbgreunbgrlem5lem3 49493 eloprab1st2nd 50310 swapf1vala 50719 swapf2f1oaALT 50731 swapfcoa 50734 fuco21 50789 fucof21 50800 prcof1 50854 thincciso 50919 |
| Copyright terms: Public domain | W3C validator |