# Integration on a region defined by an inequality

Does Sage or Maxima have a routine for -directly- calculating an integral over a region defined implicitly by an inequality. Suppose region R is defined by "f(x,y) less than c" and we want to find "integral g(x,y) over R". Does Sage have a procedure for this? The required output will be a function of c.

See also

This is doable if both of these conditions hold:

See