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/external/apache-commons-math/src/main/java/org/apache/commons/math/linear/
DQRDecompositionImpl.java90 final double[] qrtMinor = qrt[minor]; in QRDecompositionImpl() local
101 final double c = qrtMinor[row]; in QRDecompositionImpl()
104 … final double a = (qrtMinor[minor] > 0) ? -FastMath.sqrt(xNormSqr) : FastMath.sqrt(xNormSqr); in QRDecompositionImpl()
117 qrtMinor[minor] -= a; // now |v|^2 = -2a*(qr[minor][minor]) in QRDecompositionImpl()
135 alpha -= qrtCol[row] * qrtMinor[row]; in QRDecompositionImpl()
137 alpha /= a * qrtMinor[minor]; in QRDecompositionImpl()
141 qrtCol[row] -= alpha * qrtMinor[row]; in QRDecompositionImpl()
201 final double[] qrtMinor = qrt[minor]; in getQT() local
203 if (qrtMinor[minor] != 0.0) { in getQT()
207 alpha -= cachedQT.getEntry(col, row) * qrtMinor[row]; in getQT()
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