On the definition of singular bilinear forms and singular linear operators
We analyze various definitions of the concepts of a singular operator and a singular bilinear form and propose the most suitable ones. We also study the simplest properties of these objects.
English version (Springer): Ukrainian Mathematical Journal 45 (1993), no. 8, pp 1208-1214.
Citation Example: Karwowski W., Koshmanenko V. D. On the definition of singular bilinear forms and singular linear operators // Ukr. Mat. Zh. - 1993. - 45, № 8. - pp. 1084–1089.