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 Yearling
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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