A question in matrix norm.
63124
Show that $ \lVert A \rVert_2^2 \leq \lVert A \rVert _1 \lVert A \rVert _ \infty $
116273
Does every $\mathbb{R},\mathbb{C}$ vector space have a norm?
10083
Determinant of matrix times a constant.
82339
When is this norm defined?
117175
Proof that the 2-norm of orthogonal transformation of a matrix is invariant
60685
The vector space formed on C[0,1] and the norm $(\int_{0}^{1}|f(t)|^2 dt)^{1/2} $
2109
Max dimension of a subspace of singular $n\times n$ matrices
46435
2-norm of the orthogonal projection
70528
Rank of a Matrix Sum
81240
Norm of an inverse operator: $\|T^{-1}\|=\|T\|^{-1}$?
143869
Showing that the norm of the canonical projection $X\to X/M$ is $1$
88746
Positive definiteness of the matrix $A+B$
128558
Inequality between $\ell^p$-norms
145535
Product norm on infinite product space
55067
Norm of self-adjoint operator
88820
Three linked question on non-negative definite matrices.
150387
Questions about matrix rank, trace, and invertibility