Formula:KLS:14.27:22

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w ⁒ ( x ) = - 1 2 ⁒ ln ⁑ q 𝑀 π‘₯ 1 2 π‘ž {\displaystyle{\displaystyle{\displaystyle w(x)=-\frac{1}{2\ln q}}}}

Substitution(s)

w ⁒ ( x ; q ) = 1 ( - x , - q ⁒ x - 1 ; q ) ∞ 𝑀 π‘₯ π‘ž 1 q-Pochhammer-symbol π‘₯ π‘ž superscript π‘₯ 1 π‘ž {\displaystyle{\displaystyle{\displaystyle w(x;q)=\frac{1}{\left(-x,-qx^{-1};q% \right)_{\infty}}}}} &
w ⁒ ( x ) = Ξ³ Ο€ ⁒ exp ⁑ ( - Ξ³ 2 ⁒ ln 2 ⁑ x ) , x > 0 , with   Ξ³ 2 = - 1 2 ⁒ ln ⁑ q = Ξ³ Ο€ ⁒ x - 1 2 ⁒ exp ⁑ ( - Ξ³ 2 ⁒ ln 2 ⁑ x ) , x > 0 ⁒ w ⁒ i ⁒ t ⁒ h ⁒ Ξ³ 2 formulae-sequence formulae-sequence 𝑀 π‘₯ 𝛾 superscript 𝛾 2 2 π‘₯ formulae-sequence π‘₯ 0 with superscript 𝛾 2 1 2 π‘ž 𝛾 superscript π‘₯ 1 2 superscript 𝛾 2 2 π‘₯ π‘₯ 0 w i t h superscript 𝛾 2 {\displaystyle{\displaystyle{\displaystyle w(x)=\frac{\gamma}{\sqrt{\pi}}\exp% \left(-\gamma^{2}{\ln^{2}}x\right),\quad x>0,\quad\textrm{with}\quad\gamma^{2}% =-\frac{1}{2\ln q}=\frac{\gamma}{\sqrt{\pi}}x^{-\frac{1}{2}}\exp\left(-\gamma^% {2}{\ln^{2}}x\right),x>0{\rm with}\gamma^{2}}}}


Proof

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Symbols List

& : logical and
ln ln {\displaystyle{\displaystyle{\displaystyle\mathrm{ln}}}}  : principal branch of logarithm function : http://dlmf.nist.gov/4.2#E2
( a ; q ) n subscript π‘Ž π‘ž 𝑛 {\displaystyle{\displaystyle{\displaystyle(a;q)_{n}}}}  : q π‘ž {\displaystyle{\displaystyle{\displaystyle q}}} -Pochhammer symbol : http://dlmf.nist.gov/5.18#i http://dlmf.nist.gov/17.2#SS1.p1
exp exp {\displaystyle{\displaystyle{\displaystyle\mathrm{exp}}}}  : exponential function : http://dlmf.nist.gov/4.2#E19

Bibliography

Equation in Section 14.27 of KLS.

URL links

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