28 citations · 100 across the 28 of their papers we have counts for
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math.GT2008
Regular projections of graphs with at most three double points
Youngsik Huh, Ryo Nikkuni
A generic immersion of a planar graph into the 2-space is said to be knotted if there does not exist a trivial embedding of the graph into the 3-space obtained by lifting the immer…
math.GT2008★ 1 cited
An intrinsic non-triviality of graphs
Ryo Nikkuni
We say that a graph is intrinsically non-trivial if every spatial embedding of the graph contains a non-trivial spatial subgraph. We prove that an intrinsically non-trivial graph i…