User zhk

4

9

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1

answer

524

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Issue with the NDSolve code

Nov 20 '13 at 3:29 xzczd 44.2k

3

8

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1

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429

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How to solve a system of PDEs with zip condition?

differential-equations

Feb 2 '19 at 13:48 xzczd 44.2k

6

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2

answers

6k

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How to extract data from a contour plot to a text file?

plotting

Jan 18 '19 at 5:01 Albert 1

1

8

votes

2

answers

356

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Why does InverseLaplaceTranform give an incorrect solution?

differential-equations bugs integral-transforms

Apr 26 '17 at 6:50 xzczd 44.2k

4

7

votes

1

answer

766

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Free Convective Heat Transfer of Non-Newtonian Power Law Fluids from a Vertical Plate

differential-equations physics finite-difference-method discontinuity heat-transfer-equation

Apr 9 at 9:58 user21 30.1k

2

7

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2

answers

520

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NDSolve Plotting issue

plotting numerical-integration

Nov 22 '13 at 14:22 Albert Retey 22.3k

1

5

votes

1

answer

259

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NDSolve::femcmsd: The spatial derivative order of the PDE may not exceed two

differential-equations numerical-integration numerics finite-element-method nonlinear

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3

answers

1k

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How to input Robin boundary conditions for nonstandard Laplace equation?

differential-equations finite-element-method

Jul 10 at 3:17 wuyudi 4,417

5

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4

answers

576

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Stiff coupled system of ODE's

differential-equations equation-solving numerical-integration numerics nonlinear

Mar 28 '18 at 4:19 bbgodfrey 55k

4

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2

answers

384

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NDSolve::ntdvdae: Cannot solve to find an explicit formula for the derivatives

differential-equations finite-element-method

Oct 2 '19 at 7:36 user21 30.1k

3

votes

2

answers

318

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A system of ODE's with one less initial condition

differential-equations

Oct 27 '16 at 14:02 xzczd 44.2k

2

votes

2

answers

107

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ParametricNDSolveValue::ndsz

differential-equations

Jan 7 at 12:43 bbgodfrey 55k

2

votes

2

answers

2k

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Power::infy: “Infinite expression 1/0. encountered” (ODE Solution using NDSolve)

differential-equations nonlinear boundary-condition-at-infinity

Mar 31 '19 at 15:44 Michael E2 188k

1

2

votes

0

answers

264

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Solving a coupled PDEs using FEM with Robin conditions

differential-equations finite-element-method

Nov 26 '17 at 4:05 zhk 11.5k

1

2

votes

1

answer

253

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How to implement the finiteness condition for a PDE?

differential-equations numerical-integration boundary-condition-at-infinity

Sep 20 '17 at 2:21 xzczd 44.2k

2

votes

1

answer

107

views

How to find a function from a series with non-numeric coefficients?

series-expansion

Apr 16 '17 at 9:49 zhk 11.5k

1

2

votes

1

answer

280

views

NIntegrate::inumr: “The integrand `E^(-0.9τ1) DiracDelta[t-τ1] v[t-τ1] x[t-τ1]` has evaluated to non-numerical values ”

differential-equations

Oct 14 '15 at 10:13 Mariusz Iwaniuk 9,525

1

vote

1

answer

178

views

How to code this iterative process?

equation-solving iteration

Jan 16 at 20:00 Alex Trounev 24.5k

1

vote

1

answer

93

views

General::ivar: is not a valid variable [duplicate]

differential-equations evaluation warning-messages

May 30 at 1:00 xzczd 44.2k

3

1

vote

2

answers

387

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Exporting data from a Plot3D

plotting export

Feb 11 '18 at 12:05 José Antonio Díaz Navas 5,835

1

vote

1

answer

264

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How to validate the solution of a system of integro-differential equations?

differential-equations integral-equations

Apr 6 '17 at 7:03 Community♦ 1

1

vote

1

answer

473

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Equivalent of Maple `ShowSolution` command in Matematica [duplicate]

calculus-and-analysis

Jan 18 '17 at 10:55 Community♦ 1

1

vote

1

answer

258

views

How to create a data table from an expression which take values from NDSolve?

differential-equations

Dec 30 '16 at 6:42 xzczd 44.2k

1

vote

2

answers

4k

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How can I produce multiple column data for export?

export

Oct 28 '16 at 2:51 Community♦ 1

1

vote

2

answers

307

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PDE plotting assistance needed

numerical-integration

Mar 10 '15 at 19:18 george2079 37.8k

1

vote

1

answer

162

views

NDSolve printing error message NDSolve::ndode [closed]

plotting

Mar 1 '15 at 4:14 m_goldberg 104k

1

vote

1

answer

146

views

Help with plotting and improving code

plotting differential-equations

Feb 20 '15 at 13:41 m_goldberg 104k

0

votes

0

answers

51

views

InitializeBoundaryConditions::fembdnl: The dependent variable in the boundary condition needs to be linear [duplicate]

differential-equations warning-messages finite-element-method

Oct 16 at 11:26 user21 30.1k

2

0

votes

1

answer

114

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Plotting eigenvalues

differential-equations eigenvalues

Dec 9 '19 at 4:20 Community♦ 1

0

votes

1

answer

97

views

Breaks in a LogPlot

plotting differential-equations

Dec 29 '18 at 7:38 Ulrich Neumann 25.1k

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38 Questions

Issue with the NDSolve code

How to solve a system of PDEs with zip condition?

How to extract data from a contour plot to a text file?

Why does InverseLaplaceTranform give an incorrect solution?

Free Convective Heat Transfer of Non-Newtonian Power Law Fluids from a Vertical Plate

NDSolve Plotting issue

NDSolve::femcmsd: The spatial derivative order of the PDE may not exceed two

How to input Robin boundary conditions for nonstandard Laplace equation?

Stiff coupled system of ODE's

NDSolve::ntdvdae: Cannot solve to find an explicit formula for the derivatives

A system of ODE's with one less initial condition

ParametricNDSolveValue::ndsz

Power::infy: “Infinite expression 1/0. encountered” (ODE Solution using NDSolve)

Solving a coupled PDEs using FEM with Robin conditions

How to implement the finiteness condition for a PDE?

How to find a function from a series with non-numeric coefficients?

NIntegrate::inumr: “The integrand `E^(-0.9τ1) DiracDelta[t-τ1] v[t-τ1] x[t-τ1]` has evaluated to non-numerical values ”

How to code this iterative process?

General::ivar: is not a valid variable [duplicate]

Exporting data from a Plot3D

How to validate the solution of a system of integro-differential equations?

Equivalent of Maple `ShowSolution` command in Matematica [duplicate]

How to create a data table from an expression which take values from NDSolve?

How can I produce multiple column data for export?

PDE plotting assistance needed

NDSolve printing error message NDSolve::ndode [closed]

Help with plotting and improving code

InitializeBoundaryConditions::fembdnl: The dependent variable in the boundary condition needs to be linear [duplicate]

Plotting eigenvalues

Breaks in a LogPlot