What is the point of subspaces?
123408
Why a subspace of a vector space is useful
41047
Subspace Topology of a subset
65785
Difference between Euclidean space and vector space?
19396
For subspaces, if $N\subseteq M_1\cup\cdots\cup M_k$, then $N\subseteq M_i$ for some $i$?
28819
A union of two subspaces not equal to the vector space.
45111
Number of Subspaces that contains other Space
6547
Given $3$-dimensional subspaces $V, W \subset \Bbb R^5$, there is a nonzero vector in $V \cap W$
139988
Counter example for a result of intersection of subspaces
91022
How do I prove that a subspace of a vector space $X$ is the null space of some linear functional on $X$?
141762
The direct sum of two closed subspace is closed? (Hilbert space)
75592
What is the usefulness of matrices?
48579
How to find the orthogonal complement of a subspace?
35625
Direct sum of orthogonal subspaces
35305
Why is $\mathbb{R}^2$ not a subset and /or a subspace of $\mathbb{R}^3$?
28523
When would the intersection of the empty set mean anything?
100749
How to find bases for a subspace defined by an equation
139951
Direct Sum of vector subspaces