Description: The structure relation is a relation. (Contributed by Mario Carneiro, 29-Aug-2015)
Ref | Expression | ||
---|---|---|---|
Assertion | brstruct | |- Rel Struct |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-struct | |- Struct = { <. f , x >. | ( x e. ( <_ i^i ( NN X. NN ) ) /\ Fun ( f \ { (/) } ) /\ dom f C_ ( ... ` x ) ) } |
|
2 | 1 | relopabiv | |- Rel Struct |