Is this problem statement for proving the determinant of a block-matrix possibly incorrect?
104575
Formula for determinant of block matrix with commuting blocks
116376
Prove the determinant is the product of its diagonal entries
134244
Determinant of a matrix will all off-diagonal elements equal
142640
Prove determinant of a matrix $=\prod_{j<i}(a_i-a_j)$
71151
If $a_{ij}=\max(i,j)$, calculate the determinant of $A$
84522
A better proof for $\det(P) = \pm1$ if $P$ is an orthogonal matrix
121358
What is the exact relation between a full rank matrix and its determinant?
87425
Prove that if $A$ is a square matrix with integer entries and $\det(A) = \pm 1$, then $A^{-1}$ contains all integer entries.
5489
Can we use Sarrus' method for finding the determinant of matrix greater than $3\times3$?
75002
show that $\det(A)=0$ in this case
51834
Positivity of a determinant
65783
Proving: "The trace of an idempotent matrix equals the rank of the matrix"
119076
General expression for determinant of a block-diagonal matrix
133449
A proof that an orthogonal matrix with a determinant 1 is a rotation matrix
38436
If an orthogonal matrix has determinant -1 then it has -1 as an eigenvalue
44898
Help with commutative property of matrices problem
15417
Tricky problem on skew-symmetric matrices