Topologies on the $n$-element set that consistent with close to the discrete topologies on $(n −1)$-element set by Stegantseva, P. G., Skryabina, A. V., Stegantseva, P. G., Skryabina, A. V., Стєганцева, П. Г., Скрябіна, А. В.

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On the existence of a surface in the pseudo-Euclidean space with given Grassman image by Grechneva, M. A., Stegantseva, P. G., Гречнева, М. А., Стеганцева, П. Г., Гречнева, М. А., Стеганцева, П. Г.

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Example of a function of two variables that cannot be an $R$-function by Velichko, I. G., Stegantseva, P. G., Величко, И. Г., Стеганцева, П. Г., Величко, И. Г., Стеганцева, П. Г.

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