1. The problem statement, all variables and given/known data IF we consider electrons in a crystal subject to a magnetic field. The electrons near the fermi energy wil obey open or closed orbits. Using semiclassical eqn of motion and band structure for a bravais lattice, discuss the behavour and derive all conserved quantities. 2. Relevant equations hbar * dk/dt = -q(1/c * v x B ) 3. The attempt at a solution I have no idea which bravais lattice would be ideal for this problem.