DLMF:1.17.E25 (Q684)

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Language	Label	Description	Also known as
English	DLMF:1.17.E25	No description defined

Statements

Defining formula

{\displaystyle{\displaystyle\delta\left(\cos\theta_{1}-\cos\theta_{2}\right)% \delta\left(\phi_{1}-\phi_{2}\right)=\sum_{\ell=0}^{\infty}\sum_{m=-\ell}^{% \ell}Y_{{\ell},{m}}\left(\theta_{1},\phi_{1}\right)\overline{Y_{{\ell},{m}}% \left(\theta_{2},\phi_{2}\right)}.}}

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DLMF:1.17.E25

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Defining formula

{\displaystyle{\displaystyle\delta\left(\NVar{x-a}\right)}}

C1.S17.SS1.p1.m2aldec

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complex conjugate

Defining formula

{\displaystyle{\displaystyle\overline{\NVar{z}}}}

C1.S9.E11.m2adec

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cosine function

Defining formula

{\displaystyle{\displaystyle\cos\NVar{z}}}

C4.S14.E2.m2adec

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spherical harmonic

Defining formula

{\displaystyle{\displaystyle Y_{{\NVar{l}},{\NVar{m}}}\left(\NVar{\theta},% \NVar{\phi}\right)}}

C14.S30.E1.m2adec

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Sitelinks

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