Derivations of a Sullivan model and the rationalized \(G\)-sequence (Q2033826)

Summary: Let \(G_{k,n}(\mathbb{C})\) for \(2\leq k<n\) denote the Grassmann manifold of \(k\)-dimensional vector subspaces of \(\mathbb{C}^n\). In this paper, we compute, in terms of the Sullivan models, the rational evaluation subgroups and, more generally, the \(G\)-sequence of the inclusion \(G_{2,n} (\mathbb{C})\rightarrowtail G_{2,n+r}(\mathbb{C})\) for \(r\geq 1\).