(42steps) PrintForm Definitions formula equality Sections ClassicalProps(jlc) Doc

At: discrete Formula 1 1 1
1. Q: FormulaProp
2. x:{x:Formula| Q(x) }, y:Formula. Dec(x = y)
3. x1: Var
4. y: Formula

Dec(x1 = y)
By: let Solver FalseCase THEN FormulaEquality -1 in FormulaCases -1 THENL [Id;Solver;Solver;Solver;Solver]
Generated subgoal:

15. x: Var
Dec(x1 = x)

About:
decidablesetapplyfunctionequalpropall

(42steps) PrintForm Definitions formula equality Sections ClassicalProps(jlc) Doc