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

At: discrete Formula 1 3 1
1. Q: FormulaProp
2. x:{x:Formula| Q(x) }, y:Formula. Dec(x = y)
3. x1: {x:Formula| Q(x) }
4. x2: Formula
5. Q(x2)
6. y@0: Formula

Dec(x1x2 = y@0)
By: let Solver FalseCase THEN FormulaEquality -1 in FormulaCases -1 THENL [Solver;Solver;Id;Solver;Solver]
Generated subgoal:

17. x3: Formula
8. x4: Formula
Dec(x1x2 = x3x4)

About:
decidablesetapplyfunctionequalpropall

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