Addition of Two positive definite matrices
37117
Sum of positive definite matrices still positive definite?
77554
Inverse of the sum of matrices
88746
Positive definiteness of the matrix $A+B$
123808
How would I solve the following problem involving elementary matrices?
12394
Overlapping positive definite block matrices
127085
Bound on the difference of two determinants
99600
Show that a 2x2 matrix A is symmetric positive definite if and only if A is symmetric, trace(A) > 0 and det(A) > 0
100600
Linear combination of two dependent multivariate normal random variables
125348
Does $\det(A + B) = \det(A) + \det(B)$ hold?
74088
Completing a 3x3 correlation matrix: two coefficients of the three given
85550
Positive definiteness of difference of inverse matrices
51406
Determinant of a block matrix times the determinant of the inverse of a block
135252
If $M$ is positive definite, then $\operatorname{det}{(M)}\leq \prod_i m_{ii}$
22754
"matrix is not positive definite" - even when highly correlated variables are removed
146405
Norm with symmetric positive definite matrix
88728
Dimensions of vector subspaces in a direct sum are additive
46308
Simultaneous diagonlisation of two quadratic forms, one of which is positive definite