Description: Utility theorem: index-independent form of df-tset . (Contributed by NM, 20-Oct-2012)
Ref | Expression | ||
---|---|---|---|
Assertion | tsetid | |- TopSet = Slot ( TopSet ` ndx ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-tset | |- TopSet = Slot 9 |
|
2 | 9nn | |- 9 e. NN |
|
3 | 1 2 | ndxid | |- TopSet = Slot ( TopSet ` ndx ) |