Top "Loop-invariant" questions

In formal program verification, loop invariants are expressed in formal predicate logic and used to prove properties of loops and, by extension, algorithms employing loops (usually correctness properties).

What is a loop invariant?

I'm reading "Introduction to Algorithm" by CLRS. In chapter 2, the authors mention "loop invariants". What is a loop invariant?

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What is the best way of determining a loop invariant?

When using formal aspects to create some code is there a generic method of determining a loop invariant or will …

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Loop invariant of linear search

As seen on Introduction to Algorithms (http://mitpress.mit.edu/algorithms), the exercise states the following: Input: Array A[1..n] …

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Using loop invariants to prove the correctness of heap sort

What are loop invariants and how do I use them to prove the correctness of the heap sort algorithm?

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