[en] The connection of the on-shell function with the asymptotical coefficient of the three-particle wave functtion of the bound system in a configuration space is found. The expression for the leading singularity term of the exact amplitude of sub-Coulomb reactions is found in the vicinity of the nearest singularity
Original Title
Trekhchastichnye kulonovskie vershinnye funktsii na massovoj poverkhnosti. Povedenie amplitudy reaktsii odnovremennoj peredachi dvukh zaryazhennykh chastits vblizi blizhajshej osobennosti po cos0