Formula:KLS:09.03:10

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n y ( x ) = B ( x ) y ( x + i ) - [ B ( x ) + D ( x ) ] y ( x ) + D ( x ) y ( x - i ) 𝑛 𝑦 𝑥 𝐵 𝑥 𝑦 𝑥 imaginary-unit delimited-[] 𝐵 𝑥 𝐷 𝑥 𝑦 𝑥 𝐷 𝑥 𝑦 𝑥 imaginary-unit {\displaystyle{\displaystyle{\displaystyle ny(x)=B(x)y(x+\mathrm{i})-\left[B(x% )+D(x)\right]y(x)+D(x)y(x-\mathrm{i})}}}

Substitution(s)

D ( x ) = ( a + i x ) ( b + i x ) ( c + i x ) 2 i x ( 2 i x + 1 ) 𝐷 𝑥 𝑎 imaginary-unit 𝑥 𝑏 imaginary-unit 𝑥 𝑐 imaginary-unit 𝑥 2 imaginary-unit 𝑥 2 imaginary-unit 𝑥 1 {\displaystyle{\displaystyle{\displaystyle D(x)=\frac{(a+\mathrm{i}x)(b+% \mathrm{i}x)(c+\mathrm{i}x)}{2\mathrm{i}x(2\mathrm{i}x+1)}}}} &

B ( x ) = ( a - i x ) ( b - i x ) ( c - i x ) 2 i x ( 2 i x - 1 ) 𝐵 𝑥 𝑎 imaginary-unit 𝑥 𝑏 imaginary-unit 𝑥 𝑐 imaginary-unit 𝑥 2 imaginary-unit 𝑥 2 imaginary-unit 𝑥 1 {\displaystyle{\displaystyle{\displaystyle B(x)=\frac{(a-\mathrm{i}x)(b-% \mathrm{i}x)(c-\mathrm{i}x)}{2\mathrm{i}x(2\mathrm{i}x-1)}}}} &

y ( x ) = S n ( x 2 ; a , b , c ) 𝑦 𝑥 continuous-dual-Hahn-normalized-S 𝑛 superscript 𝑥 2 𝑎 𝑏 𝑐 {\displaystyle{\displaystyle{\displaystyle y(x)=S_{n}\!\left(x^{2};a,b,c\right% )}}}


Proof

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Symbols List

& : logical and
i i {\displaystyle{\displaystyle{\displaystyle\mathrm{i}}}}  : imaginary unit : http://dlmf.nist.gov/1.9.i
S n subscript 𝑆 𝑛 {\displaystyle{\displaystyle{\displaystyle S_{n}}}}  : continuous dual Hahn polynomial : http://dlmf.nist.gov/18.25#T1.t1.r3

Bibliography

Equation in Section 9.3 of KLS.

URL links

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