Ping, Zheng; Qian, Jianguo; Lin, Qifa \(\sigma\) all-ones problem on triangular grids. (Chinese. English summary) Zbl 1240.05299 Pure Appl. Math. 27, No. 1, 107-115 (2011). MSC: 05C99 Graph theory Keywords:\(\sigma\) all-ones problem; even parity cover; odd set; triangular grids × Cite Format Result Cite Review PDF