List questions from partial-differential-equations

Published on 14 Apr 2026 - 19:56

273

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explanation of (weak) null condition (as used in PDE)

Published on 12 Apr 2026 - 8:44

108

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books recommendations for discrete pde

Published on 11 Apr 2026 - 23:18

56

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references to boundary behaviour d-bar problem solutions

Published on 25 Mar 2026 - 11:12

643

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Why are test functions in the definition of weak derivatives required to be $\mathcal{C}^{\infty}$?

Published on 11 Apr 2026 - 16:14

116

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finding solution to wave equation IVP with boundary condition

Published on 10 Apr 2026 - 19:15

118

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Positive and negative powers of small parameter in perturbation problem

Published on 10 Apr 2026 - 8:37

385

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Characteristic curves PDE $uu_x+u_y=u$ with $u(x,0)=-x$

Published on 16 Apr 2026 - 6:15

40

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what is divergence of $\text{div} (nu)$?

Published on 11 Apr 2026 - 8:03

60

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Finding $\mathcal{L}^{-1}_t\left(\frac{e^{|x|\sqrt{\frac{s}{k}}}}{\sqrt{ks}}\right)$ Using the General Inversion Formula

Published on 16 Apr 2026 - 10:56

279

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Eigenvalue problems for elliptic operators on unbounded domains

Published on 11 Apr 2026 - 17:33

368

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Taking the Fourier and Laplace transform of the Heat Equation

Published on 12 Apr 2026 - 12:09

20

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How to prove that most of the systems of PDEs cannot be decoupled?

Published on 11 Apr 2026 - 21:18

56

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how can I prove that $u_{tt}=c^{2}u_{xx}$ can be reduced to $u_{\xi \eta }=0$

Published on 14 Apr 2026 - 18:25

84

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odd extension function and Dirichlet problem

Published on 12 Apr 2026 - 2:26

List Question

Dot product / PDEs, compatibility condition

explanation of (weak) null condition (as used in PDE)

books recommendations for discrete pde

references to boundary behaviour d-bar problem solutions

Why are test functions in the definition of weak derivatives required to be $\mathcal{C}^{\infty}$?

finding solution to wave equation IVP with boundary condition

Positive and negative powers of small parameter in perturbation problem

Characteristic curves PDE $uu_x+u_y=u$ with $u(x,0)=-x$

what is divergence of $\text{div} (nu)$?

Finding $\mathcal{L}^{-1}_t\left(\frac{e^{|x|\sqrt{\frac{s}{k}}}}{\sqrt{ks}}\right)$ Using the General Inversion Formula

Eigenvalue problems for elliptic operators on unbounded domains

Taking the Fourier and Laplace transform of the Heat Equation

How to prove that most of the systems of PDEs cannot be decoupled?

how can I prove that $u_{tt}=c^{2}u_{xx}$ can be reduced to $u_{\xi \eta }=0$

odd extension function and Dirichlet problem

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