Questions about data comparison and efficient ways to accomplish it.

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Comparing articles from various web-stores

Today I had the idea to write a program that compares the prizes between different web-stores. The key question I am asking myself is how to find (with a high probability) the same article on another ...
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Algorithm to maximize pairwise comparisons using transitive property

I'm looking for some direction on building an algorithm that will maximize the number of pairwise comparisons of objects in a set using transitivity. To explain in detail: Suppose there are x ...
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Compare names and the use of Levenshtein's algorithm

I need to cross names from two lists. What is the best away to compare the names? As you may expect, in one list we can have the complete name, on the other just the first and last. Besides that, ...