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bio website math.stackexchange.com/users/…
location Vancouver, Canada
age 24
visits member for 2 years, 6 months
seen Jan 27 at 5:38

The riddle does not exist. If a question can be put at all, then it can also be answered.

Ludwig Wittgenstein


When you have eliminated the impossible, whatever remains, however improbable, must be the truth.

Sir Arthur Conan Doyle (Sherlock Holmes)


Jan
24
comment Question about Ellipse
You are given a point on the ellipse and the value of $a$. Deducing the value of $b$ should be very easy.
Jan
18
comment Question about Ellipse
Why would anyone downvote my answer? Please comment when you downvote.
Jan
18
answered Question about Ellipse
Jan
10
comment Regarding the derivative of the $j$-invariant
Thank you. I will have a look.
Jan
10
accepted Regarding the derivative of the $j$-invariant
Jan
7
comment Regarding the derivative of the $j$-invariant
Thanks. Do you have a reference for this formula?
Jan
6
asked Regarding the derivative of the $j$-invariant
Jan
1
answered Find all continuous functions $f:\mathbb R\to\mathbb R$ such that $f(f(x))=e^{x}$
Dec
16
awarded  Famous Question
Dec
4
revised The affine line with two points removed
deleted 44 characters in body; edited tags
Dec
4
revised A birational map from $\mathbb{P}^1$ to an irreducible plane projective curve
deleted 12 characters in body; edited tags
Dec
4
accepted A birational map from $\mathbb{P}^1$ to an irreducible plane projective curve
Dec
3
answered How does this derivative notation work?
Dec
3
comment A birational map from $\mathbb{P}^1$ to an irreducible plane projective curve
@MarianoSuárez-Alvarez Can we just define it by $F([x : y]) : [x : y] \mapsto [x : y : -g/f]$?
Dec
3
comment A birational map from $\mathbb{P}^1$ to an irreducible plane projective curve
@MarianoSuárez-Alvarez If $z = -g(x, y)/f(x, y)$, the point would be $[x : y : -g(x, y)/f(x, y)]$.
Dec
3
comment A birational map from $\mathbb{P}^1$ to an irreducible plane projective curve
@MarianoSuárez-Alvarez Well, $z = -g(x, y)/f(x, y)$.
Dec
3
comment A birational map from $\mathbb{P}^1$ to an irreducible plane projective curve
@MarianoSuárez-Alvarez Algebra is not my strong suit. I cannot tell whether the answer is trivial or not.
Dec
3
comment A birational map from $\mathbb{P}^1$ to an irreducible plane projective curve
@MarianoSuárez-Alvarez This is my question.
Dec
2
comment A birational map from $\mathbb{P}^1$ to an irreducible plane projective curve
@MarianoSuárez-Alvarez Yes, but how do I come up with an explicit example of a birational curve?
Dec
2
asked A birational map from $\mathbb{P}^1$ to an irreducible plane projective curve