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I want to calculate Hermite normal form of a matrix. But I do not want the unimodular transformation matrix. Is there any way to stop the calculation of unimodular matrix? HermiteDecomposition function return both matrices. The reason I want to stop calculation of unimodular matrix is I think It will save some memory and computation also may little faster. My matrix size is around (45000 * 3000)

Any comment appreciated.

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No, there is no way to do that. –  Daniel Lichtblau Oct 7 '13 at 5:26

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