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Answers for “为什么乘法群条件中要排除零?”

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A nonempty set F is called a field if it satisfies three specific algebraic conditions: (i) F is an additive abelian group, (ii) the set of non-zero elements F - {0} is an abelian group with respect to multiplication, and (iii) both left and right distributive laws hold in F.

Conditions: F is a nonempty set.; The conditions must hold for all elements x, y, z in F.