Apparently, this user prefers to keep an air of mystery about them.
2 Let $G=(V=X \cup Y,E)$ be a bipartite graph.Show that G has a matching which matches every vertex of X. jan 22 '13
2 Find the general solution of the PDE jan 24 '13
1 ode/pde: Show that two functions f(x) and g(x) are linearly dependent on some open interval I jan 17 '13
1 An ode system with initial condition jan 17 '13