In this section the ground ring is an arbitrary field k of characteristic zero. A simply connected topological space X is called rationally elliptic if it satisfies the two conditions: dim H * (X; ℚ) < ∞ and dim π* (X) ⊗ ℚ < ∞ .
KeywordsSpectral Sequence Formal Dimension Regular Sequence Polynomial Algebra Homotopy Fibre
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