Proof that inverse of a matrix is unique
116136
Proof that the inverse of a square matrix is unique
127127
Prove condition number of a invertible matrix is atleast one
35345
How do i prove invertibility of this linear transformation
51406
Determinant of a block matrix times the determinant of the inverse of a block
54740
Proofs of Determinants of Block matrices
133036
Jordan normal form and invertible matrix of generalized eigenvectors proof
65783
Proving: "The trace of an idempotent matrix equals the rank of the matrix"
111406
Proving that a definition of e is unique
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?
42467
Inverse of an invertible triangular matrix (either upper or lower) is triangular of the same kind
84522
A better proof for $\det(P) = \pm1$ if $P$ is an orthogonal matrix
129564
Show that $A$ is an invertible matrix if $\left(A+I\right)^3=0$ and find $A^{-1}$
75215
Properties of invertible matrices
94855
Prove if a (mod n) has a multiplicative inverse, then it's unique
103695
Prove Inverses not need be Unique if Associativity fails
18108
Show if $(a,p)=1$ there is a unique inverse of $a$ modulo $p$
122305
Proof of matrix norm property: submultiplicativity