how det(A)=0 implies that the solution isn't unique?
106398
If $A$ is invertible show that $\det(A) \neq 0$
113518
Determinant of the inverse matrix
142519
Uniqueness and Existence problem
132239
Why is the solution single-valued?
51834
Positivity of a determinant
50732
How to determine direct solution of determinant?
147207
Is it always true that $\det(A^2+B^2)\geq0$?
2271
Determinant of a rank $1$ update of a scalar matrix, or characteristic polynomial of a rank $1$ matrix
153069
Proof for Unique Factorization Domain
84341
Can the determinant of a matrix can be made $0$?
37537
Show that $det(A)=0$ for a Matrix $A$ Such That for $X=[2,3,4]^{T}$, $AX=0$
122390
Is every solution of Einstein field equations unique?
32463
$ax\equiv b\pmod{\! n}$ has a unique solution if $\gcd(a,n) = 1$
111406
Proving that a definition of e is unique
150715
Prove that the determinant of skew-symmetric matrices of odd order is zero
71604
Why is the determinant of the 0x0 matrix equal 1?
35874
Show that when $BA = I$, the solution of $Ax=b$ is unique