Bound of the solution of nonlinear PDE $\,\Delta u = u^3 - u$
82365
what should be the range of $u$ satisfying following equation.
110854
Heat conduction problem with boundary at $\infty$
26658
A proof for $\nabla |u|^p = p\ \text{sgn}(u)|u|^{p-1}\nabla u$.
42302
Use of Holder inequality in gradient estimate for harmonic function.
139419
Problem on the domain of the solution of a differential equation
72702
Estimate on the derivative at fixed point
31672
$L^p$-norm of the gradient of a harmonic function.
142596
Evans PDE Chapter 5 Problem 11: Does $Du=0$ a.e. implie $u=c$ a.e.?
110219
Bound on the derivative of a holomorphic function at $0$
27812
Understanding the differential $dx$ when doing $u$-substitution
121765
Semigroups and solutions of equation
82625
How do I prove this using question using Cauchy-Schwarz inequality?
148470
bound of the function
119325
Finding the uniquely determined region of a PDE
142436
Solving a PDE with variable coefficients
58822
$\Delta U$, $C_p$, $C_v$ for an ideal gas process
157624
How to force the function to take positive value when solving PDE by NDSolve