Product of any two arbitrary positive definite matrices is positive definite or NOT?
88746
Positive definiteness of the matrix $A+B$
65888
A counterexample to theorem about orthogonal projection
153127
Is $U=V$ in the SVD of a symmetric positive semidefinite matrix?
133149
Inverse of a Positive Definite
135171
Under what conditions is the difference between a rank $1$, postive semidefinite matrix and a hermitian matrix positive semidefinite?
11620
Is it true that any matrix in $M_2(\mathbb R)$ is the sum of two squares?
146316
what is no. of positive eigen value of symmetric matrix A with some given relationship
90964
Prove: symmetric positive definite matrix
109573
Is sum of two orthogonal matrices singular?
158343
how to prove an element is non-zero in a tensor-product
34043
A rank-one matrix is the product of two vectors
146405
Norm with symmetric positive definite matrix
143793
If $A$ is symmetric, then the matrix exponential $e^{A}$ is positive definite
103665
Product of matrices of different order is not invertible
135252
If $M$ is positive definite, then $\operatorname{det}{(M)}\leq \prod_i m_{ii}$
75211
Theorem about positive matrices
48238
Prove the positive definiteness of Hilbert matrix