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Results tagged with matrices
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user 95514
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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Fast matrix-vector product for structured matrices
These special cases include Toeplitz-like, Hankel-like, Cauchy-like, and Vandermonde-like matrices. … Now, consider the case where $X$ is somewhat close to a Toeplitz-like matrix but instead satisfies
$$Z_1D_1X - XZ_{-1}D_2 = F,$$
where $F$ is of low rank, $D_1$ and $D_2$ are general diagonal matrices …
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