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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.

10 votes

Does Anyone Know Anything about the Determinant and/or Inverse of this Matrix?

Just a couple observations, building upon and explaining why Igor Rivin found that the denominators are often perfect squares or close to being such. Let $A$ be the matrix with components $A_{ij} = 1 …
Bruno Le Floch's user avatar