Definition of "diagonalisation" []

• In matrix algebra, the process of converting a square matrix into a diagonal matrix, usually to find the eigenvalues of the matrix. (noun)

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• "Second, the method that is used, called diagonalisation was already present in the work of du Bois-Reymond for building real functions growing faster than any function in a given sequence of functions."
• "A recent paper, Periods and elementary real numbers claims to exhibit one by means of a kind of diagonalisation argument."
• "The theoretical groundings of the recursive mathematics of Gödel can be found in famous diagonalisation method of Cantor"