4,530 reputation
1027
bio website
location
age
visits member for 3 years, 10 months
seen 16 mins ago

May
7
answered Solving a polynomial
May
7
comment Solving a polynomial
Are you familiar with Lagrange interpolation?
May
7
revised Solving a polynomial
LaTeX
May
6
awarded  Caucus
May
6
answered Please help me find a formula to find the 3rd point in a right triangle
May
6
comment Average of divisors of n.
Your question is phrased as an isolated problem, without any further information or context. It would be good to read the advice on how to ask a question and edit it to explain what progress you have made and where you are stuck.
May
6
comment What rating system should I use for a team-based webiste?
Surely the dot product would only be relevant for a team game which consists of n 1v1 games?
May
3
comment Probability/Combinatorics Question
Much better. Another tip: if you include @NameOfSomeoneInCommentThread in your comment, they get a message telling them that you've replied.
May
3
revised A continued fraction involving Bernoulli numbers
added 231 characters in body
May
3
comment Probability/Combinatorics Question
Your question is phrased as an isolated problem, without any further information or context. It would be good to read the advice on how to ask a question and edit it to explain what progress you have made and where you are stuck.
May
3
answered A continued fraction involving Bernoulli numbers
May
2
answered Looking for a Set generator
Apr
26
comment Integrate linear function over spherical triangle
Surely the answer to your edited question would be that it's just the original average, by induction over the level of subdivision? Or am I missing something?
Apr
23
comment special polynomials
Comparing the desired forms of the derivatives with the derivatives of the previous level we can establish the requirements that $a=b=c=d \pmod 4$ or (wlog) $a=b=c+2=d+2 \pmod 4$; $e=f=g \pmod 3$; and $h=i \pmod 2$. So a reasonable starting point would be a brute force check for non-trivial solutions in $\mathbb{Z}/12\mathbb{Z}[x]$.
Apr
23
revised special polynomials
added 82 characters in body
Apr
20
comment combinations of Rubik cube
And to round this off, the centre pieces are the only ones which are affected by the extra information, because the corners must be correctly rotated if the colours match.
Apr
20
comment The half-life of a radio active substance is 7.94 days. Originally there is 230g of this substance. How long before only 15g remain?
Are you given a working definition of half-life?
Apr
19
answered Finding the value of a polynomial at zero
Apr
18
awarded  Custodian
Apr
12
comment Galois group of a quintic
The discriminant tells you whether the Galois group is a subgroup of the alternating group, which suffices to distinguish $D_{10}$ (yes) and $F_{20}$ (no).