bdsqr.h

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// ========================================================================= //
// This file is part of MyraMath, copyright (c) 2014-2019 by Ryan A Chilton  //
// and distributed by MyraCore, LLC. See LICENSE.txt for license terms.      //
// ========================================================================= //

#ifndef MYRAMATH_DENSE_BDSQR_H
#define MYRAMATH_DENSE_BDSQR_H

#include <myramath/MYRAMATH_EXPORT.h>
#include <myramath/utility/Number.h>

namespace myra {

// Forward declarations.
template<class Number> class Matrix;
template<class Number> class VectorRange;

// Input is stored in two vectors, the diagonal in B0[0:N) and the superdiagonal in B1[0:N-1). 
// Returns singular vectors U and V' as real Matrix's, and overwrites B0 with singular values S. B1 is clobbered.
MYRAMATH_EXPORT std::pair<Matrix<NumberS>,Matrix<NumberS> > bdsqr_inplace(const VectorRange<NumberS>& B0, const VectorRange<NumberS>& B1);
MYRAMATH_EXPORT std::pair<Matrix<NumberD>,Matrix<NumberD> > bdsqr_inplace(const VectorRange<NumberD>& B0, const VectorRange<NumberD>& B1);

} // namespace

#endif