Metamath Proof Explorer

Theorem starvndx

Description: Index value of the df-starv slot. (Contributed by Mario Carneiro, 14-Aug-2015)

Ref Expression
Assertion starvndx 
|- ( *r ` ndx ) = 4

Proof

Step Hyp Ref Expression
1 df-starv 
 |-  *r = Slot 4
2 4nn 
 |-  4 e. NN
3 1 2 ndxarg 
 |-  ( *r ` ndx ) = 4