Empty sum

（重定向自Nullary sum）

In mathematics, an empty sum, or nullary sum, is a summation where the number of terms is zero. By convention, the value of any empty sum of numbers is zero.

Let a₁, a₂, a₃,... be a sequence of numbers, and let

be the sum of the first m terms of the sequence. Then

单词	Nullary sum
释义	Nullary sum 英语百科 Empty sum （重定向自Nullary sum） In mathematics, an empty sum, or nullary sum, is a summation where the number of terms is zero. By convention, the value of any empty sum of numbers is zero. Let a₁, a₂, a₃,... be a sequence of numbers, and let be the sum of the first m terms of the sequence. Then
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