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Hankel matrix - Wikipedia In linear algebra, a Hankel matrix (or catalecticant matrix), named after Hermann Hankel, is a rectangular matrix in which each ascending skew-diagonal from left to right is constant For example,
Hankel Matrix -- from Wolfram MathWorld A square matrix with constant skew diagonals In other words, a Hankel matrix is a matrix in which the (i,j)th entry depends only on the sum i+j Such matrices are sometimes known as persymmetric matrices or, in older literature, orthosymmetric matrices
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Hankel operator - Encyclopedia of Mathematics A Hankel operator can be defined as an operator whose matrix has the form $ ( \alpha _ { j + k} ) _ { j , k \geq 0}$ (such matrices are called Hankel matrices, cf also Padé approximation) Finite matrices whose entries depend only on the sum of the coordinates were studied first by H Hankel [a8]
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Hermann Hankel - Wikipedia Hermann Hankel (14 February 1839 – 29 August 1873) was a German mathematician Having worked on mathematical analysis during his career, he is best known for introducing the Hankel transform and the Hankel matrix