7. Suppose we have the following program to find the min of x and y: if x y ^ z = y) Prove that this program is correct.

Database System Concepts
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ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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7. Suppose we have the following program to find the min of x and y:
if x < y:
Z = X
else:
and
●
●
z = y
(trivial) precondition: T
postcondition: (x ≤ y ^ z = x) V (x > y ^ z = y)
Prove that this program is correct.
Transcribed Image Text:7. Suppose we have the following program to find the min of x and y: if x < y: Z = X else: and ● ● z = y (trivial) precondition: T postcondition: (x ≤ y ^ z = x) V (x > y ^ z = y) Prove that this program is correct.
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