Prove that solution blows up in finite time
139419
Problem on the domain of the solution of a differential equation
40343
Solutions of $p!q! = r!$
27248
If $A$ is an $m \times n$ matrix, prove that $Ax=0$ has infinite solutions $\iff$ $\text{rank}(A)<n$
102704
Prove an identity for the continuous integral solution of the conservation law
140666
Solving the Quasilinear PDE $u_{t} - u^2 u_{x} = 0$ with piecewise initial condition.
104155
Cauchy Problem for inviscid Burgers' equation
24837
$x^2+1=0$ uncountable many solutions
40564
Prove that $u(x,t)=\int_{-\infty}^{\infty}c(w)e^{-iwx}e^{-kw^2t}dw\rightarrow 0$ if $x\rightarrow \infty$
14773
Finding distinct solutions for the equation
153580
Solutions of autonomous ODEs are monotonic
71203
Proving that two systems of linear equations are equivalent if they have the same solutions
120170
A late-diverging "approximating solution" for a system of functional equations
89553
proof that every finite matrix has an annihilating polynomial
87441
Proof involving matrix equation
53998
Solving an exponential inequality problem
121902
Using the Existence and uniqueness theorem to find the interval of validity of a unique solution in a Linear ODE
4199
Evans PDE Problem 5.15: Poincaré inequality for functions with large zero set