乘法交换律是一种计算定律，两个数相乘，交换因数的位置，它们的积不变，叫做乘法交换律，用字母表示a×b=bxa。一般在只有乘法的算式计算中，一般是按照从左到右的顺序进行计算，有时候，采用乘法交换律可以进行简便运算。
在意识到矩阵表示将导致物理量不满足乘法交换律之前，海森堡并没有前进太远。
Heisenberg had not proceeded very far with this idea before he noticed that it would lead to his physical quantities not satisfying the commutative law of multiplication.
我们容易验证乘法满足结合律和交换律，并且由加法结果的唯一性得出乘法结果的唯一性和乘法消去律。
We then can verify the associative law and the commutative law for multiplication, and the uniqueness of the result of addition indicates the uniqueness and the cancellation law for multiplication.
应用推荐