Question: For a set of linear algebraic equations in matrix format, (mathbf{A x}-mathbf{y}), for a unique solution to exist, (operatorname{det}(mathbf{A})) should be ___________.

For a set of linear algebraic equations in matrix format, $\mathbf{A x}-\mathbf{y}$, for a unique solution to exist, $\operatorname{det}(\mathbf{A})$ should be ___________.

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