Prove that the equation has a solution
40063
$x^2+y^2=z^n$: Find solutions without Pythagoras!
14517
Existence of solutions of the equation with a limit.
26689
A.P. terms in a Quadratic equation.
14773
Finding distinct solutions for the equation
54222
Prove the map has a fixed point
69839
Prove that a system of linear equations, will have infinitely many solutions whenever there is a specific value.
7466
How would I prove that if an integer $n>2$, then $\bar{z}=z^{n-1}$ has $n+1$ solutions
126445
Proving the second root of a quadratic equation
133076
Prove this sum equal to an expression.
87441
Proof involving matrix equation
40343
Solutions of $p!q! = r!$
3621
How can I show that $y'=\sqrt{|y|}$ has infinitely many solutions?
154327
$A^2X = X$ show that $AX = X$, if $A_{ij} > 0$ and $x_{i} > 0$
104609
For which $a$ does the equation $f(z) = f(az) $ has a non constant solution $f$
85540
Prove or Disprove the Existence of Solutions...
44354
Total number of solutions of an equation
131120
Proving an integral equation.