Carl Wilhelm Borchardt

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Carl Wilhelm Borchardt was a German mathematician. Borchardt was born to a Jewish family in Berlin. His father, Moritz, was a respected merchant, and his mother was Emma Heilborn. Borchardt under a number of tutors, including Dirichlet, until 1839, when he left for Königsberg. He did research in the area of arithmetic-geometric mean, continuing work by Gauss and Lagrange. He generalised the results of Kummer diagonalising symmetric matrices, …