A Note on the vec Operator Applied to Unbalanced Block‐Structured Matrices
Hal Caswell and
Silke F. van Daalen
Journal of Applied Mathematics, 2016, vol. 2016, issue 1
Abstract:
The vec operator transforms a matrix to a column vector by stacking each column on top of the next. It is useful to write the vec of a block‐structured matrix in terms of the vec operator applied to each of its component blocks. We derive a simple formula for doing so, which applies regardless of whether the blocks are of the same or of different sizes.
Date: 2016
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https://doi.org/10.1155/2016/4590817
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Persistent link: https://EconPapers.repec.org/RePEc:wly:jnljam:v:2016:y:2016:i:1:n:4590817
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