  The Dwyer-Fried invariants of a finite cell complex X are the subsets
\Omega^i_r(X) of the Grassmannian of r-planes in H^1(X,\Q) which parametrize
the regular \Z^r-covers of X having finite Betti numbers up to degree i. In
previous work, we showed that each \Omega-invariant is contained in the
complement of a union of Schubert varieties associated to a certain subspace
arrangement in H^1(X,\Q). Here, we identify a class of spaces for which this
inclusion holds as equality. For such "straight" spaces X, all the data
required to compute the \Omega-invariants can be extracted from the resonance
varieties associated to the cohomology ring H^*(X,\Q). In general, though,
translated components in the characteristic varieties affect the answer.

Algebraic Geometry;Algebraic Topology