Finding the inverse of a matrix involving reciprocals of positive integers
108589
The inverse of the matrix $\{1/(i+j-1)\}$
137109
Evaluating a summation of inverse squares over odd indices
44879
Multiplicative inverse questions
88746
Positive definiteness of the matrix $A+B$
43570
Finding two non-zero matrices where $AX = BA$
111769
Why is inverse of orthogonal matrix is its transpose?
116798
First-year matrix problem: How do you show that a sum of an identity matrix and another matrix is equal to the sum's inverse?
18470
A practical way to check if a matrix is positive-definite
35345
How do i prove invertibility of this linear transformation
155272
Is a matrix with $1$s in the diagonal and off-diagonal entries with absolute value less than $1$ invertible?
119301
Is the following matrix invertible?
77554
Inverse of the sum of matrices
122434
Adjoint of a matrix and inverse of a matrix
141922
Reason for reversing the order when transpose and inverse of a group of matrices
133449
A proof that an orthogonal matrix with a determinant 1 is a rotation matrix
88712
Determining a matrix from its characteristic polynomial
137920
Proving an equation with invertible matrices