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1 vote

1 answer

51 views

accuracy problem for a null space calculation on a sparse rectangular matrix

Federico Poloni

11.1k

answered 3 hours ago

-1 votes

1 answer

30 views

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727

answered 15 hours ago

2 votes

1 answer

136 views

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ConvexHull

1,253

modified yesterday

0 votes

0 answers

46 views

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solanin

1

modified 22 hours ago

1 vote

1 answer

56 views

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111

answered yesterday

0 votes

0 answers

22 views

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user86422

1

asked yesterday

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21 views

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吴yuer

151

asked yesterday

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47 views

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Young Q

1

asked 2 days ago

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41 views

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whpowell96

2,054

modified 2 days ago

0 votes

1 answer

71 views

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Wolfgang Bangerth

54.2k

answered Dec 2 at 3:45

5 votes

2 answers

438 views

Number of function calls and jacobian calls in scipy.root

Tarik

173

modified Nov 29 at 8:14

2 votes

1 answer

76 views

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Federico Poloni

11.1k

answered Dec 1 at 15:36

1 vote

1 answer

43 views

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Lutz Lehmann

5,544

modified Dec 2 at 6:27

0 votes

1 answer

86 views

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Lutz Lehmann

5,544

modified Dec 2 at 12:45

3 votes

1 answer

222 views

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Maxim Umansky

2,440

modified 2 days ago

0 votes

0 answers

35 views

Methods for delaying the "break" in non-linear least squares optimisation when the step size gets too small?

THAT'S MY QUANT MY QUANTITATIV

101

modified Dec 1 at 23:58

0 votes

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36 views

Which numerical method can I use to solve this system of hyperbolic PDEs?

Nikola Ristic

227

modified Dec 1 at 22:35

1 vote

1 answer

138 views

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IPribec

544

modified Nov 30 at 11:21

2 votes

1 answer

127 views

Large set of nonlinear equations in Sympy

mmikkelsen

369

answered Nov 29 at 13:50

0 votes

0 answers

49 views

eigenvalues of inhomogeneous Helmholtz equation violate superposition using FEM

Ekrem Ekici

11

asked Nov 29 at 21:21

2 votes

1 answer

156 views

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Evgeny

21

modified Nov 27 at 19:03

12 votes

2 answers

2k views

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whpowell96

2,054

modified Nov 30 at 17:27

2 votes

1 answer

89 views

references for optimization in the context of parameter identification with finite elements

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2,054

modified Nov 25 at 17:53

1 vote

2 answers

96 views

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111

modified Nov 28 at 11:33

1 vote

1 answer

86 views

Symmetry axis boundary condition

Nikola Ristic

227

answered Nov 25 at 22:15

3 votes

0 answers

70 views

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Jared Frazier

233

modified Nov 24 at 17:32

2 votes

1 answer

113 views

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tyrela

21

modified Nov 23 at 1:59

3 votes

1 answer

184 views

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Federico Poloni

11.1k

modified Nov 19 at 8:28

9 votes

1 answer

1k views

Why is it that SVD routines on nearly square matrices run significantly faster than if the matrix was highly non square?

helloworld922

2,391

modified Nov 10 at 6:32

0 votes

1 answer

67 views

How to plot the power spectrum

138 Aspen

133

modified Nov 25 at 2:09

5 votes

0 answers

114 views

Single precision vs double precision conjugate gradients

lightxbulb

1,271

asked Nov 17 at 14:08

2 votes

0 answers

42 views

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2,273

modified Nov 20 at 19:27

0 votes

1 answer

44 views

draw a log-log plot of MSD (mean square displacement) versus `t` of a movement of the polymer chain

Wolfgang Bangerth

54.2k

answered Nov 19 at 0:08

4 votes

0 answers

120 views

FVM for non-regular domain with triangular mesh

VIVID

91

modified Nov 19 at 11:17

3 votes

1 answer

175 views

Stability of Euler forward method

lightxbulb

1,271

modified Nov 13 at 9:19

2 votes

3 answers

202 views

Approximation of derivatives in the finite volume method

Matthew Hunt

131

answered Nov 23 at 12:03

1 vote

1 answer

72 views

Does anyone know how to add a forcing term at the center of a cicular membrane?

Konstantinos

25

modified Nov 22 at 2:44

0 votes

0 answers

81 views

A confusion about the bubble function in lumped mass FEM

Maxim Umansky

2,440

modified Nov 16 at 20:30

1 vote

1 answer

83 views

Adding a diffusion term to the MUSCL - Kurganov and Tadmor central scheme

ConvexHull

1,253

answered Nov 15 at 7:35

2 votes

1 answer

82 views

enough conditions to check that a matrix doesn't have Cholesky factorization while factorizing it

Abdullah Ali Sivas

2,411

answered Nov 13 at 20:33

1 vote

1 answer

116 views

Calculating Hypergeometric1F1 for large arguments

nicoguaro♦

8,370

answered Nov 14 at 14:56

2 votes

0 answers

57 views

Numerical integration in Fourier space over 3D grid

JasonC

31

modified Nov 16 at 3:05

0 votes

0 answers

46 views

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JS4137

133

asked Nov 15 at 5:24

0 votes

0 answers

59 views

Softening vs Smoothing Length... Is There a Difference?

dcro

1

modified Nov 19 at 17:37

1 vote

0 answers

42 views

Solution to the Liouville-Gibbs equation

homocomputeris

395

asked Nov 14 at 20:27

0 votes

1 answer

53 views

Local truncation error of given implicit 1-step scheme

Lutz Lehmann

5,544

answered Nov 12 at 19:13

-2 votes

1 answer

131 views

Question re Maxima, Magma and/or Sage computational language capabilities

nicoguaro♦

8,370

modified Nov 11 at 22:02

1 vote

1 answer

82 views

derivative matrix and the Dirac delta distribution

Wolfgang Bangerth

54.2k

answered Nov 10 at 15:15

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