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In mathematics, especially in linear algebra and matrix theory, the duplication matrix and the elimination matrix are linear transformations used for transforming half-vectorizations of matrices into vectorizations or (respectively) vice versa.
For a symmetric matrix A, the vector vec(A) contains more information than is strictly necessary, since the matrix is completely determined by the symmetry together with the lower triangular portion, that is, the n(n + 1)/2 entries on and below the main diagonal.
Row echelon form — a matrix in this form is the result of applying the forward elimination procedure to a matrix (as used in Gaussian elimination). Wronskian — the determinant of a matrix of functions and their derivatives such that row n is the (n−1) th derivative of row one.
[[Category:Double-elimination bracket templates]] to the <includeonly> section at the bottom of that page. Otherwise, add <noinclude>[[Category:Double-elimination bracket templates]]</noinclude> to the end of the template code, making sure it starts on the same line as the code's last character.
“In the fragmented and heavily regulated health care system, health plans, providers and drugmakers share a responsibility to make high-quality care as affordable as possible and easier to ...
Templates of policies are provided in the literature [3]: 233–255 [7]: 141–175 [8]: 255–277 and by those trained in the model in order to illustrate what model-consistent policies might look like. However these templates are not themselves the model and their use does not substitute for a board developing its own policies using the model ...
Researchers from the University of British Columbia have developed a "groundbreaking coating" that could make blood-contacting devices safer. Dr. Jayachandran Kizhakkedathu discusses the benefits.
Health insurance industry officials remain uncharacteristically reserved in the aftermath of the fatal shooting of UnitedHealthcare CEO Brian Thompson on Dec. 4.