1<?xml version='1.0'?> 2<!DOCTYPE html PUBLIC '-//W3C//DTD XHTML 1.1 plus MathML 2.0//EN' 3 'http://www.w3.org/TR/MathML2/dtd/xhtml-math11-f.dtd' 4 [<!ENTITY mathml 'http://www.w3.org/1998/Math/MathML'>]> 5<html xmlns='http://www.w3.org/1999/xhtml'> 6<head><title>polygamma8</title> 7<!-- MathML created with MathCast Equation Editor version 0.89 --> 8</head> 9<body> 10<math xmlns="http://www.w3.org/1998/Math/MathML" display="block"> 11 <mrow> 12 <msup> 13 <mi>ψ</mi> 14 <mfenced> 15 <mrow> 16 <mi>n</mi> 17 </mrow> 18 </mfenced> 19 </msup> 20 <mfenced> 21 <mrow> 22 <mn>1</mn> 23 </mrow> 24 </mfenced> 25 <mo>=</mo> 26 <msup> 27 <mfenced> 28 <mrow> 29 <mo>−</mo> 30 <mn>1</mn> 31 </mrow> 32 </mfenced> 33 <mrow> 34 <mi>n</mi> 35 <mo>+</mo> 36 <mn>1</mn> 37 </mrow> 38 </msup> 39 <mi>n</mi> 40 <mo>!</mo> 41 <mi>ς</mi> 42 <mfenced> 43 <mrow> 44 <mi>n</mi> 45 <mo>+</mo> 46 <mn>1</mn> 47 </mrow> 48 </mfenced> 49 </mrow> 50</math> 51</body> 52</html>