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行列式係線性代數入面嘅一類函數,將一個嘅矩陣映射到一個純量,呢個純量可以反映出個矩陣同埋矩陣代表嘅線性映射嘅一啲性質,例如行列式非零等價於矩陣可逆,又等價於個線性映射係同構。矩陣嘅行列式可以寫成作、或。
矩陣嚟講行列式可以定義做:
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