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1. Solving Heun's equation using conformal blocks / Pia̧tek, Marcin ; Pietrykowski, Artur R.
It is known that the classical limit of the second order BPZ null vector decoupling equation for the simplest two 5-point degenerate spherical conformal blocks yields: (i) the normal form of the Heun equation with the complex accessory parameter determined by the 4-point classical block on the sphere, and (ii) a pair of the Floquet type linearly independent solutions. [...]
Published in Nuclear Physics B 938 (2019) 543-570 10.1016/j.nuclphysb.2018.11.021
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