Rybalkina T. V.
Ukr. Mat. Zh. - 2014. - 66, № 10. - pp. 1407–1413
We consider oriented cycles of linear mappings over the fields of real and complex numbers. the problem of their classification to within the homeomorphisms of spaces is reduced to the problem of classification of linear operators to within the homeomorphisms of spaces studied by N. Kuiper and J. Robbin in 1973.
Ukr. Mat. Zh. - 2012. - 64, № 6. - pp. 739-751
We study closed 1-forms with isolated zeros on closed orientable surfaces. Conditions under which given invariants generate a closed 1-form are found.