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- W2039968554 abstract "We present and analyze an algorithm for computing the cosine of a matrix which is based on the double-angle formula $cos 2A = 2cos ^2 A - I$. We discuss the relevance of this computation to second-order matrix differential equations. We draw the analogy between this method for the cosine and the familiar scaling and squaring method for computing the matrix exponential. Numerical experiments employing polynomial and rational approximations to the cosine, in conjunction with the double angle technique, are presented." @default.
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- W2039968554 modified "2023-09-23" @default.
- W2039968554 title "An Algorithm for Computing the Matrix Cosine" @default.
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- W2039968554 doi "https://doi.org/10.1137/0901013" @default.
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