%0 Journal Article %A I. A. Ibragimov %A N. V. Smorodina %A M. M. Faddeev %T A limit theorem on convergence of random walk functionals to a~solution of the Cauchy problem for the equation $\frac{\partial u}{\partial t}=\frac{\sigma^2}2\,\Delta u$ with complex~$\sigma$ %J Zapiski Nauchnykh Seminarov POMI %D 2013 %P 88-102 %V 420 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_2013_420_a4/ %G ru %F ZNSL_2013_420_a4