Joshua Ciappara
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 Mar 12 comment Find the values of $a$ and $b$ such that the polynomials have two common roots. Why must the roots of $H$ be real? Couldn't you have a pair of complex conjugates in common? Mar 2 comment Rational but not iso. to $\mathbb{P}^1$ $\Rightarrow$ iso. to open subset of $\mathbb{A}^1$ Nice. I think I had an issue with terminology, but your response has cleared it up. If you post it as an answer I'll accept it. Mar 1 comment Rational but not iso. to $\mathbb{P}^1$ $\Rightarrow$ iso. to open subset of $\mathbb{A}^1$ I'm not sure I follow. Mar 1 comment Rational but not iso. to $\mathbb{P}^1$ $\Rightarrow$ iso. to open subset of $\mathbb{A}^1$ I've seen this statement, yes. Mar 1 comment Rational but not iso. to $\mathbb{P}^1$ $\Rightarrow$ iso. to open subset of $\mathbb{A}^1$ Hi Roland. You're right, I should have said it needs to be non-singular. Mar 1 revised Rational but not iso. to $\mathbb{P}^1$ $\Rightarrow$ iso. to open subset of $\mathbb{A}^1$ added 2 characters in body Mar 1 asked Rational but not iso. to $\mathbb{P}^1$ $\Rightarrow$ iso. to open subset of $\mathbb{A}^1$ Feb 7 comment $G$ is a finite group, if $ab^{-1}=ba^{-1}$ and $n$ is odd, then $a=b$ Hint: Lagrange's theorem. Dec 13 awarded Yearling Nov 11 asked Measure of vanishing set for BV function Nov 8 comment Inequality $|ab|+1\leq |ab-b| + |b-1|$ for real numbers $a,b$ This inequality is false. Take $a = b = 1$. Oct 1 comment Subgroup generated by specific simple transpositions Sorry. W_i = W_{ \{i \} } and so on. The subscripts denote sets. Oct 1 asked Subgroup generated by specific simple transpositions Aug 23 accepted The space of homeomorphisms of the closed unit interval Aug 23 asked Closure of Schubert cell is the Schubert variety Aug 16 revised The space of homeomorphisms of the closed unit interval edited title Aug 16 asked The space of homeomorphisms of the closed unit interval Jun 23 revised Example: Krull dimension 1 but not a PID correction Jun 23 accepted Example: Krull dimension 1 but not a PID Jun 22 awarded Inquisitive