User usero - Computational Science Stack Exchange

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	763 reputation	bio	website		visits	member for	1 year, 3 months
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11

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281

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Projecting out the null-space of $A$ from $b$ in $Ax=b$

apr 30 '12 at 12:03 usero 763

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10

votes

3

answers

307

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Understanding the “rate of convergence” for iterative methods

iterative-method convergence

nov 30 at 7:06 Geoff Oxberry♦ 9,422

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4

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445

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Finding the square root of a Laplacian matrix

linear-algebra matrices eigensystem

apr 11 '12 at 18:24 Willowbrook 256

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1

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378

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Jacobi iteration to reduce the quadratic function

linear-algebra optimization iterative-method matrices

mar 3 '12 at 13:38 Hui Zhang 530

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6

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3

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324

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Eigenvectors with the Power Iteration

linear-algebra matrices eigensystem iterative-method

oct 2 at 14:12 Christian Clason 2,471

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2

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622

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Safe application of iterative methods on diagonally dominant matrices

linear-algebra optimization iterative-method matrices linear-solver

mar 26 '12 at 8:24 Hui Zhang 530

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3

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1

kviews

Gershgorin Circle Theorem to estimate the eigenvalues

linear-algebra matrices eigensystem

mar 29 '12 at 18:44 Martin 1,376

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2

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129

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Simplifying some operations on Gram matrices

linear-algebra optimization matrices

jul 22 '12 at 15:48 J. M. 1,630

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1

answer

108

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Constructing the origin position by transforming distance information

linear-algebra matrices high-dimensional

apr 17 '12 at 18:44 usero 763

3

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1

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278

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Power Iteration on general matrices (with higher multiplicity of dominant eigenvalue)

linear-algebra matrices eigensystem

nov 1 at 16:49 Arnold Neumaier 8,690

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1

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152

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Manipulating a generalized eigenvector problem to plain eigenvector problem

linear-algebra matrices eigensystem

oct 4 at 18:55 Jack Poulson 5,491

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1

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73

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High-dimensional representation of arbitrary input

linear-algebra matrices high-dimensional

sep 12 at 12:50 usero 763

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2

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159

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Positive semi-definiteness of a (symmetric) matrix

linear-algebra matrices eigensystem

aug 7 at 7:08 usero 763

3

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1

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160

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Application of an orthogonal matrix to a 3D configuration of point

linear-algebra matrices computational-geometry geometry

may 18 '12 at 13:37 Arnold Neumaier 8,690

3

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1

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172

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3D to 2D projections, a generalization

linear-algebra matrices high-dimensional

may 9 '12 at 17:23 Geoff Oxberry♦ 9,422

3

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1

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52

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2D Jacobi line maintenance?

linear-algebra optimization computational-geometry linear-solver

mar 7 '12 at 19:53 Victor Liu 1,367

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1

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86

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Configuration shift to change the rank of a Gram matrix

linear-algebra matrices high-dimensional

jun 6 at 21:27 Community♦ 1

2

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1

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64

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Optimality criterion of PCA via recovered distances

linear-algebra matrices machine-learning high-dimensional

dec 21 at 22:39 hardmath 1,184

2

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1

answer

46

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Configuration shift for determination of a true dimensionality

linear-algebra matrices

oct 30 at 16:22 Arnold Neumaier 8,690

2

votes

1

answer

89

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Recovering coordinates by eigendecomposition without double-centering

linear-algebra matrices computational-geometry high-dimensional

sep 18 at 17:34 Arnold Neumaier 8,690

2

votes

2

answers

88

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Handling inconsistent solutions obtained by PCA

linear-algebra matrices high-dimensional machine-learning

aug 4 at 20:23 Wolfgang Bangerth 11.5k

2

votes

2

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85

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A sufficient number of distances to recover relative positions of n points

matrices computational-geometry high-dimensional machine-learning geometry

jul 6 '12 at 13:25 Arnold Neumaier 8,690

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2

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1

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154

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Proof continuation for rigid transformation on PCA solution

linear-algebra matrices eigensystem high-dimensional

apr 2 '12 at 14:42 Arnold Neumaier 8,690

2

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1

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166

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Spectral decomposition with eigenvalue shift

linear-algebra matrices eigensystem

mar 20 '12 at 16:54 Geoff Oxberry♦ 9,422

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0

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21

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PCA performed on a configuration with scaled axes

linear-algebra matrices high-dimensional

dec 26 at 20:05 usero 763

1

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1

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42

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Existence of a solution at a stationary equation for quadratics

linear-algebra optimization matrices convex-optimization

nov 15 at 15:50 Arnold Neumaier 8,690

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3

answers

154

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Convergence of the gradient descent and linear vs non-linear fixed point iteration

linear-algebra matrices linear-solver iterative-method

sep 13 at 12:17 Jed Brown 15k

1

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1

answer

61

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Normalizing axes prior to PCA

linear-algebra matrices high-dimensional machine-learning

jul 27 at 19:52 usero 763

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2

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119

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What does “Counting algebraic multiplicity” mean?

linear-algebra matrices eigensystem

jul 13 '12 at 11:22 Arnold Neumaier 8,690

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0

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148

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Perron-Frobenius theorem on general real symmetric matrices

linear-algebra optimization matrices eigensystem

apr 5 '12 at 12:43 usero 763

usero

37 Questions