Contact: Gertie Skaarup

skaarup@nbi.dk

045-353-25320

University of Copenhagen

## A Matrix is a Rectangular Array of Numbers

**Caption:** A matrix is a rectangular array of numbers. A random matrix can be compared to a Sudoku filled with random numbers. Matrices are part of the equations governing the movements of the particles. In a random matrix there are numbers that are entered randomly, while there are still certain symmetries, for example, you can require that the numbers in the lower left should be a copy of the numbers above the diagonal. This is called a symmetrical matrix.

**Credit:** Kim Splittorff, Associate Professor, Niels Bohr Institute, University of Copenhagen

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