(45steps) PrintForm Definitions formula equality Sections ClassicalProps(jlc) Doc

At: discrete Formula with rank 1 2 1 1
1. x: Formula
2. x1: Formula
3. y:Formula. Dec(x1 = y)
4. y@0: Formula
5. x2: Formula

Dec(x1 = x2)
By: With x2 (Analyze -3)
Generated subgoal:

13. y@0: Formula
4. x2: Formula
5. Dec(x1 = x2)
Dec(x1 = x2)

About:
decidableequalall

(45steps) PrintForm Definitions formula equality Sections ClassicalProps(jlc) Doc