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11: 11.6 Asymptotic Expansions

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11.6.3 $${\int }_0^z{𝐊}_0\left(t\right)dt-\frac{2}{\pi }(\ln \left(2z\right)+\gamma )\sim \frac{2}{\pi }\sum _{k=1}^{\mathrm{\infty }}{(-1)}^{k+1}\frac{(2k)!(2k-1)!}{{(k!)}^2{(2z)}^{2k}},$$ $|\mathrm{ph}z|\le \pi -\delta$,

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Symbols:

$\gamma$: Euler’s constant, ${𝐊}_{\nu }\left(z\right)$: Struve function, $\sim$: Poincaré asymptotic expansion, $\pi$: the ratio of the circumference of a circle to its diameter, $dx$: differential of $x$ , $!$: factorial (as in $n!$), $\int$: integral, $\ln z$: principal branch of logarithm function, $\mathrm{ph}$: phase, $z$: complex variable, $k$: nonnegative integer and $\delta$: arbitrary small positive constant

A&S Ref:

12.1.32

Referenced by:

§11.6(i)

Permalink:

http://dlmf.nist.gov/11.6.E3

Encodings:

pMML, png, TeX

See also:

Annotations for §11.6(i), §11.6 and Ch.11

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11.6.4 $${\int }_0^z{𝐌}_0\left(t\right)dt+\frac{2}{\pi }(\ln \left(2z\right)+\gamma )\sim \frac{2}{\pi }\sum _{k=1}^{\mathrm{\infty }}\frac{(2k)!(2k-1)!}{{(k!)}^2{(2z)}^{2k}},$$ $|\mathrm{ph}z|\le \frac{1}{2}\pi -\delta$,

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Symbols:

$\gamma$: Euler’s constant, ${𝐌}_{\nu }\left(z\right)$: modified Struve function, $\sim$: Poincaré asymptotic expansion, $\pi$: the ratio of the circumference of a circle to its diameter, $dx$: differential of $x$ , $!$: factorial (as in $n!$), $\int$: integral, $\ln z$: principal branch of logarithm function, $\mathrm{ph}$: phase, $z$: complex variable, $k$: nonnegative integer and $\delta$: arbitrary small positive constant

A&S Ref:

12.2.8

Referenced by:

§11.6(i)

Permalink:

http://dlmf.nist.gov/11.6.E4

Encodings:

pMML, png, TeX

See also:

Annotations for §11.6(i), §11.6 and Ch.11

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$c_3(\lambda )=20{\lambda }^{-6}-4{\lambda }^{-4},$

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12: 18.39 Applications in the Physical Sciences

… ►This follows from the fact that the eigenvalues (18.39.31), ${ϵ}_{n,l}={ϵ}_n=-Z^2/(2n^2)$ depend only on the single quantum number $n$, the Bohr Principal quantum number, $n=1,2,\mathrm{\dots }$, and depend explicitly neither on $l$ nor $m_l$. … ►Derivations of (18.39.42) appear in Bethe and Salpeter (1957, pp. 12–20), and Pauling and Wilson (1985, Chapter V and Appendix VII), where the derivations are based on (18.39.36), and is also the notation of Piela (2014, §4.7), typifying the common use of the associated Coulomb–Laguerre polynomials in theoretical quantum chemistry. …

13: 12.10 Uniform Asymptotic Expansions for Large Parameter

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12.10.7 $$\xi =\frac{1}{2}t\sqrt{t^2-1}-\frac{1}{2}\ln \left(t+\sqrt{t^2-1}\right).$$

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Defines:

$\xi$ (locally)

Symbols:

$\ln z$: principal branch of logarithm function

Referenced by:

§12.10(vi), §12.10(vii), §12.14(ix)

Permalink:

http://dlmf.nist.gov/12.10.E7

Encodings:

pMML, png, TeX

See also:

Annotations for §12.10(ii), §12.10 and Ch.12

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12.10.26 $$\overline{\xi }=\frac{1}{2}t\sqrt{t^2+1}+\frac{1}{2}\ln \left(t+\sqrt{t^2+1}\right),$$

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Defines:

$\overline{\xi }$ (locally)

Symbols:

$\ln z$: principal branch of logarithm function

Permalink:

http://dlmf.nist.gov/12.10.E26

Encodings:

pMML, png, TeX

See also:

Annotations for §12.10(v), §12.10 and Ch.12

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12.10.33 $${𝖠}_{s+1}(\tau )=-4{\tau }^2{(\tau +1)}^2\frac{d}{d\tau }{𝖠}_s(\tau )-\frac{1}{4}{\int }_0^{\tau }\left(20u^2+20u+3\right){𝖠}_s(u)du,$$ $s=0,1,2,\mathrm{\dots }$,

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Defines:

${𝖠}_s(\tau )$: coefficients (locally)

Symbols:

$\frac{df}{dx}$: derivative of $f$ with respect to $x$ , $dx$: differential of $x$ , $\int$: integral, $s$: nonnegative integer and $\tau$

Permalink:

http://dlmf.nist.gov/12.10.E33

Encodings:

pMML, png, TeX

See also:

Annotations for §12.10(vi), §12.10 and Ch.12

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$${𝖠}_1(\tau )=-\frac{1}{12}\tau (20{\tau }^2+30\tau +9),$$

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