DLMF:27.7.E4 (Q8044): Difference between revisions

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Created a new Item: Wikidata Toolkit example test item creation
 
Changed an Item: Add constraint
Property / constraint
 

| x | < 1 𝑥 1 {\displaystyle{\displaystyle|x|<1}}

|x|<1
Property / constraint: | x | < 1 𝑥 1 {\displaystyle{\displaystyle|x|<1}} / rank
 
Normal rank

Revision as of 18:21, 30 December 2019

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DLMF:27.7.E4
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    Statements

    n = 1 ϕ ( n ) x n 1 - x n = x ( 1 - x ) 2 , superscript subscript 𝑛 1 Euler-totient-phi 𝑛 superscript 𝑥 𝑛 1 superscript 𝑥 𝑛 𝑥 superscript 1 𝑥 2 {\displaystyle{\displaystyle\sum_{n=1}^{\infty}\phi\left(n\right)\frac{x^{n}}{% 1-x^{n}}=\frac{x}{(1-x)^{2}},}}
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    DLMF:27.7.E4
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    | x | < 1 𝑥 1 {\displaystyle{\displaystyle|x|<1}}
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