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Mirrors > Home > ILE Home > Th. List > 0fv | Unicode version |
Description: Function value of the empty set. (Contributed by Stefan O'Rear, 26-Nov-2014.) |
Ref | Expression |
---|---|
0fv |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-fv 5131 | . 2 | |
2 | noel 3367 | . . . . . 6 | |
3 | df-br 3930 | . . . . . 6 | |
4 | 2, 3 | mtbir 660 | . . . . 5 |
5 | 4 | nex 1476 | . . . 4 |
6 | euex 2029 | . . . 4 | |
7 | 5, 6 | mto 651 | . . 3 |
8 | iotanul 5103 | . . 3 | |
9 | 7, 8 | ax-mp 5 | . 2 |
10 | 1, 9 | eqtri 2160 | 1 |
Colors of variables: wff set class |
Syntax hints: wn 3 wceq 1331 wex 1468 wcel 1480 weu 1999 c0 3363 cop 3530 class class class wbr 3929 cio 5086 cfv 5123 |
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-in1 603 ax-in2 604 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-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 |
This theorem depends on definitions: df-bi 116 df-tru 1334 df-fal 1337 df-nf 1437 df-sb 1736 df-eu 2002 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-ral 2421 df-rex 2422 df-v 2688 df-dif 3073 df-in 3077 df-ss 3084 df-nul 3364 df-sn 3533 df-uni 3737 df-br 3930 df-iota 5088 df-fv 5131 |
This theorem is referenced by: strsl0 12007 |
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