Least upper bound on set of positive semidefinite matrices
95481
The set of self-adjoint operators over a Hilbert space doesn't form a lattice
48238
Prove the positive definiteness of Hilbert matrix
10478
Matrix reciprocal positive to prove $λ_{max⁡}=n$
92249
Every finite set contains its supremum: proof improvement.
36775
Matrix semi-positive definite
898
Strictly diagonally dominant matrices are non singular
125889
Determinant of rank-one perturbations of (invertible) matrices
135252
If $M$ is positive definite, then $\operatorname{det}{(M)}\leq \prod_i m_{ii}$
138457
Seminorms: Absolute Convexity
135316
A basic question on diagonalizability of a matrix
36613
Prove that simultaneously diagonalizable matrices commute
149916
Minimum eigenvalue and singular value of a square matrix
30268
Positive definite matrix must be Hermitian
85550
Positive definiteness of difference of inverse matrices
5616
How can I prove the IFF condition for this group of matrices?
13228
Proofs of AM-GM inequality
146405
Norm with symmetric positive definite matrix