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Mirrors > Home > ILE Home > Th. List > f0 | Unicode version |
Description: The empty function. (Contributed by NM, 14-Aug-1999.) |
Ref | Expression |
---|---|
f0 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2154 | . . 3 | |
2 | fn0 5282 | . . 3 | |
3 | 1, 2 | mpbir 145 | . 2 |
4 | rn0 4835 | . . 3 | |
5 | 0ss 3428 | . . 3 | |
6 | 4, 5 | eqsstri 3156 | . 2 |
7 | df-f 5167 | . 2 | |
8 | 3, 6, 7 | mpbir2an 927 | 1 |
Colors of variables: wff set class |
Syntax hints: wceq 1332 wss 3098 c0 3390 crn 4580 wfn 5158 wf 5159 |
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 604 ax-in2 605 ax-io 699 ax-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1481 ax-10 1482 ax-11 1483 ax-i12 1484 ax-bndl 1486 ax-4 1487 ax-17 1503 ax-i9 1507 ax-ial 1511 ax-i5r 1512 ax-14 2128 ax-ext 2136 ax-sep 4078 ax-nul 4086 ax-pow 4130 ax-pr 4164 |
This theorem depends on definitions: df-bi 116 df-3an 965 df-tru 1335 df-fal 1338 df-nf 1438 df-sb 1740 df-eu 2006 df-mo 2007 df-clab 2141 df-cleq 2147 df-clel 2150 df-nfc 2285 df-ral 2437 df-rex 2438 df-v 2711 df-dif 3100 df-un 3102 df-in 3104 df-ss 3111 df-nul 3391 df-pw 3541 df-sn 3562 df-pr 3563 df-op 3565 df-br 3962 df-opab 4022 df-id 4248 df-xp 4585 df-rel 4586 df-cnv 4587 df-co 4588 df-dm 4589 df-rn 4590 df-fun 5165 df-fn 5166 df-f 5167 |
This theorem is referenced by: f00 5354 f0bi 5355 f10 5441 map0g 6622 ac6sfi 6832 0met 12731 |
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