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