The intersection $\bigcap_iW_i$ consists of vectors belonging to every listed subspace. It is a subspace. For example, the intersection of coordinate planes $z=0$ and $y=0$ in $\mathbb R^3$ is the $x$-axis. An intersection differs from a union, which need not be a subspace.
Parents
Like how this is organised?
Build your own knowledge tree on knowen.md: notes, decisions and tasks in one connected markdown graph, shared with your team and your AI agents.