Metamath Proof Explorer


Definition df-starv

Description: Define the involution function of a *-ring. (Contributed by NM, 4-Sep-2011) (Revised by Mario Carneiro, 14-Aug-2015) Use its index-independent form starvid instead. (New usage is discouraged.)

Ref Expression
Assertion df-starv 𝑟 = Slot 4

Detailed syntax breakdown

Step Hyp Ref Expression
0 cstv class 𝑟
1 c4 class 4
2 1 cslot class Slot 4
3 0 2 wceq wff 𝑟 = Slot 4