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 Jun 27 asked The mathematics behind Clebsch-Gordan Coefficients Jun 24 comment Number of occurrences of the digit 1 in the numbers from 0 to n While this is a correct way to approach this particular question, the actual problem in question (which is a project Euler problem) requires the sum total of all numbers that satisfy this condition for all digits 1-10. Not so easy (or fast) do with this brute force method (where do you set the upper search limit for instance?). Jun 24 comment Number of occurrences of the digit 1 in the numbers from 0 to n This is a not-so-veiled attempt to elicit a solution to a project euler problem. Jun 22 asked Alternative group laws over the reals Jun 4 comment Reason why these two probabilities are equal (Picking Balls in exact order without Replacement) Intuitively there is a degeneracy between "sublevels" of the same ordering (i.e there are 12 different ways to pick AAABB but they are equivalent). Thus there is nothing special about one ordering versus another, therefore you would expect results that only differ in ordering to have the same probability. May 31 comment Throwing All Numbers From 2 to 12 With Two Dice What do you mean by "expected". In other words, at what probability threshold do you draw the line - the probability of all numbers appearing approaches, but never hits 1. May 24 suggested rejected edit on Linear Algebra Question May 19 comment How can there be multiple irreducible representations of a group each having distinct dimension? @Jack since the markup is a subset of latex, the command syntax- $\color{color-you-want}{text}$ will introduce color in the math expression (i.e. within dollar signs), if you want colored text - place the text within a math-mode \text{text-goes-here} command May 14 awarded Nice Question May 9 comment Divisibility of 9 and $(n-1)^3 + n^3 + (n+1)^3$ @Theo funny that I had seen weierstrass p-functions without the script p. Is the W-p relevant in this situation (with the polynomial presented by Isaac) or is it just a stylistic variation on his part? May 8 comment Divisibility of 9 and $(n-1)^3 + n^3 + (n+1)^3$ Never seen a script p like that used as a symbol. Where does it come from? May 8 comment Is there any mathematical operation on Integers that yields the same result as doing bitwise “AND”? @Felipe what you have just described is a perfectly valid definition for the function you are looking for... Apr 11 comment Given a null surface, calculate the manifold it resides in @joriki this is correct. I'll edit my question to be more clear. Apr 11 awarded Organizer Apr 11 comment What does the math notation $\sum$ mean? Symbolic computation, while sharing the same first word as your question does not quite relate, retagged to notation. Apr 11 revised What does the math notation $\sum$ mean? edited tags Apr 11 asked Given a null surface, calculate the manifold it resides in Dec 12 comment Computer Programs for Pure Mathematicians @Raphael @J.M. of course there are open source alternatives to almost every commercial package. I will edit my question in the morning to add in free alternatives Dec 12 answered Computer Programs for Pure Mathematicians Dec 11 comment Why does dust gather in corners? Maybe there is an effect similiar to Lagrangian points for gravitational fields?