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:
“Merrily swinging on brier and weed,
Near to the nest of his litle dame,
Over the mountainside or mead,
Robert of Lincoln is telling his name:
Bob-o’-link, bob-o’-link,”
—William Cullen Bryant (1794–1878)