List questions from partial-differential-equations

Published on 15 Apr 2026 - 14:16

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First order PDE with discontinuous coefficients

Published on 14 Apr 2026 - 5:33

9.6k

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The backwards heat equation is not well posed

Published on 10 Apr 2026 - 0:27

430

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Mathematical Description for Steam Rising from a Cup

Published on 11 Apr 2026 - 22:52

67

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$-p_{xx}+f(p)=0$ has a unique solution $p$

Published on 15 Apr 2026 - 18:44

4.6k

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Writing the squared sine as a Legendre polynomial of cosine

Published on 04 Apr 2026 - 7:28

2.4k

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Waves on the Half Line - difference between Dirichlet and Neumann problems?

Published on 13 Apr 2026 - 11:53

42

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The absolutely continuous representative of $t \mapsto (u(t), v(t))_{L^2}$

Published on 14 Apr 2026 - 16:23

71

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Proving a PDE has a particular weak form (check my proof please!)

Published on 14 Apr 2026 - 4:51

106

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Separation of Variables of a PDE

Published on 13 Apr 2026 - 14:07

645

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Separation of variables in heat equation with decay

Published on 07 Apr 2026 - 17:41

1.3k

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Laplace Equation Polar Form Separation of Variables Problem

Published on 11 Apr 2026 - 4:38

189

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How can Use Gronwall for this PDE?

Published on 14 May 2026 - 14:04

148

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Equivalence of two definitions of weak solution (from a book, I don't understand something!!!!)

Published on 10 May 2026 - 18:44

1.2k

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Solving the Cauchy problem $u(0,y) = \sin y$ for PDE $u_x = yu_y$

Published on 15 May 2026 - 11:57

List Question

Density of $C\infty([0,T];V)$ in $W(0,T;V,V)$.

First order PDE with discontinuous coefficients

The backwards heat equation is not well posed

Mathematical Description for Steam Rising from a Cup

$-p_{xx}+f(p)=0$ has a unique solution $p$

Writing the squared sine as a Legendre polynomial of cosine

Waves on the Half Line - difference between Dirichlet and Neumann problems?

The absolutely continuous representative of $t \mapsto (u(t), v(t))_{L^2}$

Proving a PDE has a particular weak form (check my proof please!)

Separation of Variables of a PDE

Separation of variables in heat equation with decay

Laplace Equation Polar Form Separation of Variables Problem

How can Use Gronwall for this PDE?

Equivalence of two definitions of weak solution (from a book, I don't understand something!!!!)

Solving the Cauchy problem $u(0,y) = \sin y$ for PDE $u_x = yu_y$

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