Proof: Do Expr At Unchanged 3

Let's prove the following theorem:

if the following are true:

expression state at time 3 = "begin_expr"
the expression at time 3 = entry "ES": "Estonia"

then the expression at time 4 = entry "ES": "Estonia"

Proof:

View as a tree | View dependent proofs | Try proving it

Given

1	expression state at time 3 = "begin_expr"
2	the expression at time 3 = entry "ES": "Estonia"

Proof Table

#	Claim	Reason
1	the expression at time (3 + 1) = the expression at time 3	if expression state at time 3 = "begin_expr", then the expression at time (3 + 1) = the expression at time 3 (Insn Count Begin Expression (1))
2	the expression at time (3 + 1) = entry "ES": "Estonia"	if the expression at time (3 + 1) = the expression at time 3 and the expression at time 3 = entry "ES": "Estonia", then the expression at time (3 + 1) = entry "ES": "Estonia" (Transitive Property of Equality)
3	3 + 1 = 4	3 + 1 = 4 (Fixed Value Statement)
4	the expression at time (3 + 1) = the expression at time 4	if 3 + 1 = 4, then the expression at time (3 + 1) = the expression at time 4 (Substitution)
5	the expression at time 4 = entry "ES": "Estonia"	if the expression at time (3 + 1) = the expression at time 4 and the expression at time (3 + 1) = entry "ES": "Estonia", then the expression at time 4 = entry "ES": "Estonia" (Transitive Property of Equality Variation 2)

Comments

Please log in to add comments