S Lawrencenko - Graphs and Combinatorics, 2010 - Springer
A new class of polyhedra is discovered—bipyramids of arbitrarily prescribed genus. A two- dimensional generalization of Fáry's Theorem is established. A purely combinatorial …
S Lawrencenko - arXiv preprint arXiv:1207.1882, 2012 - arxiv.org
A method is suggested for construction of quadrangulations of the closed orientable surface with given genus g and either (1) with given chromatic number or (2) with given order …
К Дуванова, В Зайцева, А Фатьянов… - … вопросы теории и …, 2020 - elibrary.ru
В работе предлагается создавать карты районирования (например, туристского районирования) так, чтобы степень каждого внутреннего узла карты была бы чётной …
S Lawrencenko, J Mao, C Wang - Mathematica Applicata, 1998 - elibrary.ru
Let $ G $ be a graph (other than $ K_6 $ or $ K_7 $) that triangulates a closed surface $ S $. If for every vertex $ v $ of $ G $, the graph $ G $ has a unique Hamiltonian cycle through the …
S Lawrencenko - arXiv preprint arXiv:1308.2935, 2013 - arxiv.org
A new formula is obtained in algebraic topology, in terms of Betti numbers, and a new method, called the spinal method, is suggested and developed for generating …