- A typical ``theoretical'' calculation in condensed
matter or high energy physics involves integrals of form
where is spin (gluon field) at site

**i**. - Typically, the sites are in a regular lattice in two, three, or
four dimensions.
- This integral would involve solve
dimensions and so must be evaluated by Monte Carlo.
- is not a very rapidly varying function (typically a
polynomial in the ).
- Also, we want to do integral for several different choices for
.
- The Hamiltonian
**H**is proportional to size of system and so the weighting function is very small and one must be very careful to choose one's integration points appropriately.

Geoffrey Fox, Northeast Parallel Architectures Center at Syracuse University, gcf@npac.syr.edu