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May
9
comment Spherical geometry - relating angles of lunes and segments of great circles
It might be simpler to define $\varphi$ as the angle $NC\frac{A+B}2$ where $N$ is the pole.
May
9
awarded  Custodian
May
9
reviewed Reviewed Probability of Couples
May
9
reviewed Leave Closed What is the probability that both the fuses are defective?
May
9
revised Functional Equation help
Correct table for consistency with explanation
May
9
reviewed Close Functional Equation help
May
8
awarded  Custodian
May
8
reviewed Looks OK Existence of limit of $\lim_{n \to \infty}\sum_{i=0}^{[n/2]} \frac 1 n f \left(\frac i n \right)$!
May
7
comment Solving a polynomial
@AxenZhyrkhinsky, meta.math.stackexchange.com/q/5020/5676 is a good introduction to the mathematical markup. With appropriate sub- and superscripts your formula for $y_z$ is correct. For $\prod_{j \ne 2}$, the $j$ is not 2. It takes the (relevant) values which aren't 2: i.e. 3 and 4. If we define $L(a, b) = b/(a-b)$ then (using my preferred, shorter, formulation) $K^\prime = \sum_i y_i \prod_{j \ne i}L(i,j) = y_2 L(2,3) L(2,4) + y_3 L(3,2) L(3,4) + y_4 L(4,2) L(4,3)$. (It's quite natural that the product should be over $j\ne i$ because if $j=i$ we get division by zero).
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