May 17		answered	Solving $x^{\log(x)}=\frac{x^3}{100}$
May 17		answered	Simplify $\log_23\ \log_34\ \log_4 5\ \log_5 6\ \log_6 7\ \log_7 8$
May 13		awarded	Teacher
May 12		comment	Find the longest subsequence of two strings This link might help you.. ics.uci.edu/~eppstein/161/960229.html
May 12		answered	Finding cycles in a graph
May 12		answered	Show that the matrix $A^2 + I$ is invertible for all matrices $A$, where $A$ is an $n \times n$ symmetric matrix.
May 12		awarded	Popular Question
May 12		comment	How prove this matrix $rank (A_{11}A_{12})=rank(A_{12})$ What do you mean by $A_{11}A_{12}$? Submatrix multiplied or just the concatenation of cols?
May 6		awarded	Popular Question
May 6		comment	Permutation & Combination - how many numbers smaller than $2.10^8$ and are divisible by $3$ can be written by means of the digits $0$,$1$ and $2$ Total number of numbers divisible by $3$ is $2.10^8/3$. Now we need to count only the numbers whose digit are $0,1,2 $
May 5		awarded	Yearling
May 5		awarded	Yearling
Apr 27		awarded	Notable Question
Apr 24		awarded	Supporter
Apr 24		comment	How to determine Center of Gravity? intuition is enuough
Apr 24		asked	How to determine Center of Gravity?
Apr 22		awarded	Yearling
Apr 22		awarded	Yearling
Apr 6		asked	How to print frequency k words from more than 1TB of data?
Apr 4		comment	Strings of same length to graph structure im not asking for solution. Need to know which data structure to use?