Description: Define the class of all constructible sets. Definition 15.15 of TakeutiZaring p. 158. (Contributed by BTernaryTau, 3-Sep-2026)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | df-l | Could not format assertion : No typesetting found for |- _L = ( _FL " On ) with typecode |- |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 0 | cl | Could not format _L : No typesetting found for class _L with typecode class | |
| 1 | cfnl | Could not format _FL : No typesetting found for class _FL with typecode class | |
| 2 | con0 | ||
| 3 | 1 2 | cima | Could not format ( _FL " On ) : No typesetting found for class ( _FL " On ) with typecode class |
| 4 | 0 3 | wceq | Could not format _L = ( _FL " On ) : No typesetting found for wff _L = ( _FL " On ) with typecode wff |