Minimal, isotropic spectral representation

Expanding the wave functions with an appropriate subset of the full get of basis functions reduces the memory and run-time requirements by a factor of about sixteen in the limit of a large calculation. Fortunately, our software design limits all knowledge of the details of the basis set to the operators O(), L(), cI(), cIdag(), cJ(), cJdag(). Thus, modifying our code to take advantage of reducing the basis set requires only modification of the corresponding functions (if needed) and of the initialization file ``setup.m''.

This optimization represents major modifications to your basic operators. Copy all of the current ``.m'' files from ``$\sim$/A3'' into a new working directory ``$\sim$/A3a''.