Single-entry matrix

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In mathematics a single-entry matrix is a matrix where a single element is one and the rest of the elements are zero,[1][2] e.g.,

\mathbf{J}^{23} = \left[\begin{matrix}
0 & 0 & 0 \\ 0 & 0 & 1 \\ 0 & 0 & 0 \end{matrix}\right]

[edit] Reference

  1. ^ Kaare Brandt Petersen & Michael Syskind Pedersen (2008-02-16). The Matrix Cookbook.
  2. ^ Shohei Shimizu, Patrick O. Hoyer, Aapo Hyvärinen & Antti Kerminen (2006). "A Linear Non-Gaussian Acyclic Model for Causal Discovery". Journal of Machine Learning Research 7: 2003–2030.