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

At: discrete Formula with rank 1 5 1 1 1 2 1
1. x: Formula
2. y1: Formula
3. y2: Formula
4. y@0: Formula
5. y3: Formula
6. y4: Formula
7. Dec(y2 = y4)
8. y1y2 = y3y4

y1 = y3
By:
FormulaEquality -1
THEN
Trivial
Generated subgoals:

None

About:
decidableequal

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