Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > ffdm | Unicode version |
Description: A mapping is a partial function. (Contributed by NM, 25-Nov-2007.) |
Ref | Expression |
---|---|
ffdm |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fdm 5273 | . . . 4 | |
2 | 1 | feq2d 5255 | . . 3 |
3 | 2 | ibir 176 | . 2 |
4 | eqimss 3146 | . . 3 | |
5 | 1, 4 | syl 14 | . 2 |
6 | 3, 5 | jca 304 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wceq 1331 wss 3066 cdm 4534 wf 5114 |
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-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-11 1484 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 |
This theorem depends on definitions: df-bi 116 df-nf 1437 df-sb 1736 df-clab 2124 df-cleq 2130 df-clel 2133 df-in 3072 df-ss 3079 df-fn 5121 df-f 5122 |
This theorem is referenced by: smoiso 6192 dvcj 12831 dvfre 12832 |
Copyright terms: Public domain | W3C validator |