…
►►►Figure 5.12.1:
-plane.
Contour for first loop integral for the beta function.
Magnify
…
►►►Figure 5.12.2:
-plane.
Contour for second loop integral for the beta function.
Magnify►
M. E. H. Ismail and D. R. Masson (1994)
-Hermite polynomials, biorthogonal rational functions, and -betaintegrals.
Trans. Amer. Math. Soc.346 (1), pp. 63–116.