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 Jan13 awarded Commentator Oct27 accepted Taking a derivative of this formula Oct26 revised Taking a derivative of this formula added 442 characters in body Oct26 revised Taking a derivative of this formula deleted 1 characters in body Oct26 asked Taking a derivative of this formula Oct13 awarded Editor Oct13 revised Representation of this function using a single formula without conditions deleted 9 characters in body Oct13 comment Representation of this function using a single formula without conditions Sorry, my mistake, will edit it now. $G = G(x)$ Oct12 awarded Student Oct12 awarded Scholar Oct12 accepted Representation of this function using a single formula without conditions Oct12 awarded Supporter Oct12 comment Representation of this function using a single formula without conditions What if we represent the $|x|$ like this: $|x| = \sqrt{x^2}$. Then at least we can find the derivative. Oct12 comment Why does this algorithm work? No indexes like $i$ and $j$ in the $p_{ij}^{(n)}$ formula? So every element of the matrix has the same value? Oct12 comment Why does this algorithm work? Sorry, but a question about $p_{ij}^{(n)}$ what is it? element of the matrix $P^n$? And what are $A$ and $B$ some numbers right? Oct12 asked Representation of this function using a single formula without conditions