Folded spectrum method
Folded Spectrum Method (FSM) is a Iterative method for solving large Eigenvalue problems. Here you always find a vector with a Eigenvalue close to a search-value. This means you can get a vector in the middle of the spectrum without solving the matrix.
Literature:
- J. K. L. MacDonald, Phys. Rev. 46, 828 - 828 (1934)
- W. Wang and A. Zunger, J. Phys. Chem. 98, 2158 (1994)
- W. Wang and A. Zunger, J. Chem. Phys. 100, 2394 (1994)
- http://www.sst.nrel.gov/topics/nano/escan.html