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Mirrors > Home > ILE Home > Th. List > op1sta | Unicode version |
Description: Extract the first member of an ordered pair. (See op2nda 5018 to extract the second member and op1stb 4394 for an alternate version.) (Contributed by Raph Levien, 4-Dec-2003.) |
Ref | Expression |
---|---|
cnvsn.1 | |
cnvsn.2 |
Ref | Expression |
---|---|
op1sta |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cnvsn.2 | . . . 4 | |
2 | 1 | dmsnop 5007 | . . 3 |
3 | 2 | unieqi 3741 | . 2 |
4 | cnvsn.1 | . . 3 | |
5 | 4 | unisn 3747 | . 2 |
6 | 3, 5 | eqtri 2158 | 1 |
Colors of variables: wff set class |
Syntax hints: wceq 1331 wcel 1480 cvv 2681 csn 3522 cop 3525 cuni 3731 cdm 4534 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 ax-sep 4041 ax-pow 4093 ax-pr 4126 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-rex 2420 df-v 2683 df-un 3070 df-in 3072 df-ss 3079 df-pw 3507 df-sn 3528 df-pr 3529 df-op 3531 df-uni 3732 df-br 3925 df-dm 4544 |
This theorem is referenced by: op1st 6037 fo1st 6048 f1stres 6050 xpassen 6717 xpdom2 6718 |
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