 Atiyah–Hirzebruch spectral sequence

In mathematics, the Atiyah–Hirzebruch spectral sequence is a spectral sequence for calculating generalized cohomology, introduced by in the special case of topological K-theory.For a CW complex formula_1 and a generalized cohomology theory formula_2, it relates the generalized cohomology groups

with 'ordinary' cohomology groups formula_4 with coefficients in the generalized cohomology of a point.