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Questions where the notion matrix has an important or crucial role (for the latter, note the tag matrix-theory for potential use). Matrices appear in various parts of mathematics, and this tag is typically combined with other tags to make the general subject clear, such as an appropriate top-level tag ra.rings-and-algebras, co.combinatorics, etc. and other tags that might be applicable. There are also several more specialized tags concerning matrices.

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Identifying winner of tournament (A,B testings) with none binary test result [closed]

I'm trying to setup a tournament based on votes. Let say user vote for products A, B and C. Each user is presented all possible combinations of products in random order and he picks his preferred prod …