2019
Том 71
№ 11

# Mikityuk Ya. V.

Articles: 2
Brief Communications (Ukrainian)

### Multiplication operator on a matrix polynomial

Ukr. Mat. Zh. - 1992. - 44, № 9. - pp. 1287–1289

It is proved that the study of a perturbed multiplication operator on a matrix polynomial in the space $L_2(ℝ, ℂ^n)$ may be reduced to the study of a perturbed multiplication operator with independent variable in the space $L_2(ℝ, ω, ℂ^N)$ with weight $ω$ satisfying the Mackenhaupt condition.

Article (Ukrainian)

### Differential operators on the axis with boundary condition at the origin

Ukr. Mat. Zh. - 1982. - 34, № 2. - pp. 219-222