Contraction operators, defect functions, and scattering theory
We study functions that describe scattering through inner channels of a system (defect functions) and the corresponding contraction operators.
English version (Springer): Ukrainian Mathematical Journal 49 (1997), no. 4, pp 529-538.
Citation Example: Boiko C. C., Dubovoi V. K., Fritzsche B., Kirstein B. Contraction operators, defect functions, and scattering theory // Ukr. Mat. Zh. - 1997. - 49, № 4. - pp. 481–489.