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单词 step function
释义

step function

A step function is a linear combination of indicator functions of bounded intervals. That is a function of the form

where the Ik are bounded intervals. This step function can then be assigned (in a well-defined manner) the integral

where l(I) denotes the length of the interval I. Consequently step functions are a natural starting point for theorems of integration.

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更新时间:2025/4/29 21:39:32