A Note on the vec Operator Applied to Unbalanced Block-Structured Matrices

Open Access
Authors
Publication date 2016
Journal Journal of applied mathematics
Article number 4590817
Volume | Issue number 2016
Number of pages 3
Organisations
  • Faculty of Science (FNWI) - Institute for Biodiversity and Ecosystem Dynamics (IBED)
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.
Document type Article
Language English
Published at https://doi.org/10.1155/2016/4590817
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4590817_ (Final published version)
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