In an infinite-dimensional space V, as used in functional analysis, the flag idea generalises to a subspace nest, namely a collection of subspaces of V that is a total order for inclusion and which further is closed under arbitrary intersections and closed linear spans. See nest algebra.
Read more about this topic: Flag (linear Algebra)
Famous quotes containing the word nest:
“We were all on this ship in the sixties, our generation, a ship going to discover the New World. And the Beatles were in the crow’s nest of that ship.”
—John Lennon (1940–1980)