Metamath Proof Explorer


Definition df-mtc

Description: Define the set of typecodes in a Metamath formal system. (Contributed by Mario Carneiro, 14-Jul-2016)

Ref Expression
Assertion df-mtc mTC = Slot 4

Detailed syntax breakdown

Step Hyp Ref Expression
0 cmtc mTC
1 c4 4
2 1 cslot Slot 4
3 0 2 wceq mTC = Slot 4