Uskov, Vladimir Igorevich Properties of one higher order matrix-differential operator. (Russian. English summary) Zbl 1513.35128 Vestn. Ross. Univ., Mat. 27, No. 138, 175-182 (2022). MSC: 35G16 PDFBibTeX XMLCite \textit{V. I. Uskov}, Vestn. Ross. Univ., Mat. 27, No. 138, 175--182 (2022; Zbl 1513.35128) Full Text: DOI MNR
Khachatryan, Rafik Agasievich The conditions of minimum for a smooth function on the boundary of a quasidifferntiable set. (Russian. English summary) Zbl 1480.90229 Vestn. Ross. Univ., Mat. 25, No. 130, 165-182 (2020). MSC: 90C30 PDFBibTeX XMLCite \textit{R. A. Khachatryan}, Vestn. Ross. Univ., Mat. 25, No. 130, 165--182 (2020; Zbl 1480.90229) Full Text: DOI MNR