The integration contour is a loop around the negative real axis; it starts at ,
encircles the origin once in the positive direction without enclosing any of the points
and returns to
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& : logical and
: Riemann zeta function : http://dlmf.nist.gov/25.2#E1
: Euler's gamma function : http://dlmf.nist.gov/5.2#E1
: ratio of a circle's circumference to its diameter : http://dlmf.nist.gov/5.19.E4
: integral : http://dlmf.nist.gov/1.4#iv
: the base of the natural logarithm : http://dlmf.nist.gov/4.2.E11
: differential : http://dlmf.nist.gov/1.4#iv
Equation (20), Section 25.5 of DLMF.
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