DLMF:4.38.E6 (Q1956): Difference between revisions

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Changed an Item: Add constraint
 
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Property / constraint
 

z 0 greater-than-or-less-than 𝑧 0 {\displaystyle{\displaystyle\Im z\gtrless 0}}

\imagpart@@{z}\gtrless 0
Property / constraint: z 0 greater-than-or-less-than 𝑧 0 {\displaystyle{\displaystyle\Im z\gtrless 0}} / rank
 
Normal rank
Property / constraint
 

| z | 1 𝑧 1 {\displaystyle{\displaystyle\left|z\right|\geq 1}}

\abs{z}\geq 1
Property / constraint: | z | 1 𝑧 1 {\displaystyle{\displaystyle\left|z\right|\geq 1}} / rank
 
Normal rank
Property / Symbols used
 
Property / Symbols used: the ratio of the circumference of a circle to its diameter / rank
 
Normal rank
Property / Symbols used: the ratio of the circumference of a circle to its diameter / qualifier
 
Defining formula:

π {\displaystyle{\displaystyle\pi}}

\cpi
Property / Symbols used: the ratio of the circumference of a circle to its diameter / qualifier
 
xml-id: C3.S12.E1.m2adec
Property / Symbols used
 
Property / Symbols used: Q11248 / rank
 
Normal rank
Property / Symbols used: Q11248 / qualifier
 
Defining formula:

arctanh z hyperbolic-inverse-tangent 𝑧 {\displaystyle{\displaystyle\operatorname{arctanh}\NVar{z}}}

\atanh@@{\NVar{z}}
Property / Symbols used: Q11248 / qualifier
 
xml-id: C4.S37.SS2.p1.m10aadec
Property / Symbols used
 
Property / Symbols used: Q10901 / rank
 
Normal rank
Property / Symbols used: Q10901 / qualifier
 
Defining formula:

absent {\displaystyle{\displaystyle\Im}}

\imagpart@@
Property / Symbols used: Q10901 / qualifier
 
xml-id: C1.S9.E2.m2adec
Property / Symbols used
 
Property / Symbols used: imaginary unit / rank
 
Normal rank
Property / Symbols used: imaginary unit / qualifier
 
Defining formula:

i imaginary-unit {\displaystyle{\displaystyle\mathrm{i}}}

\iunit
Property / Symbols used: imaginary unit / qualifier
 
xml-id: C1.S9.E1.m2adec
Property / Symbols used
 
Property / Symbols used: Q11217 / rank
 
Normal rank
Property / Symbols used: Q11217 / qualifier
 
Defining formula:

z 𝑧 {\displaystyle{\displaystyle z}}

z
Property / Symbols used: Q11217 / qualifier
 
xml-id: C4.S1.XMD8.m1edec

Latest revision as of 19:19, 1 January 2020

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DLMF:4.38.E6
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    Statements

    arctanh z = ± i π 2 + 1 z + 1 3 z 3 + 1 5 z 5 + , hyperbolic-inverse-tangent 𝑧 plus-or-minus imaginary-unit 𝜋 2 1 𝑧 1 3 superscript 𝑧 3 1 5 superscript 𝑧 5 {\displaystyle{\displaystyle\operatorname{arctanh}z=\pm\mathrm{i}\frac{\pi}{2}% +\frac{1}{z}+\frac{1}{3z^{3}}+\frac{1}{5z^{5}}+\cdots,}}
    0 references
    DLMF:4.38.E6
    0 references
    z 0 greater-than-or-less-than 𝑧 0 {\displaystyle{\displaystyle\Im z\gtrless 0}}
    0 references
    | z | 1 𝑧 1 {\displaystyle{\displaystyle\left|z\right|\geq 1}}
    0 references
    π {\displaystyle{\displaystyle\pi}}
    C3.S12.E1.m2adec
    0 references
    arctanh z hyperbolic-inverse-tangent 𝑧 {\displaystyle{\displaystyle\operatorname{arctanh}\NVar{z}}}
    C4.S37.SS2.p1.m10aadec
    0 references
    absent {\displaystyle{\displaystyle\Im}}
    C1.S9.E2.m2adec
    0 references
    i imaginary-unit {\displaystyle{\displaystyle\mathrm{i}}}
    C1.S9.E1.m2adec
    0 references
    z 𝑧 {\displaystyle{\displaystyle z}}
    C4.S1.XMD8.m1edec
    0 references