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Definition df-fin 4380
Description: Define the set of all finite sets. Definition from [Rosser], p. 417. (Contributed by SF, 12-Jan-2015.)
Assertion
Ref Expression
df-fin Fin = Nn

Detailed syntax breakdown of Definition df-fin
StepHypRef Expression
1 cfin 4376 . 2 class Fin
2 cnnc 4373 . . 3 class Nn
32cuni 3891 . 2 class Nn
41, 3wceq 1642 1 wff Fin = Nn
Colors of variables: wff setvar class
This definition is referenced by:  finex  4397  elfin  4420  sfinltfin  4535  nulnnn  4556  ncssfin  6151
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