Apparently, this user prefers to keep an air of mystery about them.
13 prove that there is no function that feb 28 '13
5 Show that there is a star for which there are less stars in its column than in its row. feb 28 '13
4 Finding a parameter of a function apr 10 '13
2 Solving the equation: $\cos(x)= \cos(2x)$ apr 7 '13
1 The right way to calculate the volume obtained by rotating the area between 2 graphs around the x axis apr 12 '13
1 Describe the set of all good numbers mar 1 '13
0 Finding a value - problem in the question? mar 18 '13