Proof: Get Begin Expr State 33

Let's prove the following theorem:

if the following are true:

the expression at time 33 = "ES"
expression state at time 33 = "begin_expr"
"ES" is constant
parent stack at time 33 = [ __setitem__(locations, "ES", "Spain"), [ ] ]

then expression state at time 34 = "return"

Proof:

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

Given

1	the expression at time 33 = "ES"
2	expression state at time 33 = "begin_expr"
3	"ES" is constant
4	parent stack at time 33 = [ `__setitem__(locations, "ES", "Spain")`, [ ] ]

Proof Table

#	Claim	Reason
1	expression state at time (33 + 1) = "return"	if expression state at time 33 = "begin_expr" and the expression at time 33 = "ES" and "ES" is constant and parent stack at time 33 = [ `__setitem__(locations, "ES", "Spain")`, [ ] ], then expression state at time (33 + 1) = "return" (Evaluate Constant Argument State Property)
2	33 + 1 = 34	33 + 1 = 34 (Fixed Value Statement)
3	expression state at time (33 + 1) = expression state at time 34	if 33 + 1 = 34, then expression state at time (33 + 1) = expression state at time 34 (Substitution)
4	expression state at time 34 = "return"	if expression state at time (33 + 1) = expression state at time 34 and expression state at time (33 + 1) = "return", then expression state at time 34 = "return" (Transitive Property of Equality Variation 2)

Comments

Please log in to add comments