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arxiv: 1806.09719 · v1 · pith:VWOR6KDEnew · submitted 2018-06-25 · 🧮 math.GT

Bisected vertex leveling of plane graphs: braid index, arc index and delta diagrams

classification 🧮 math.GT
keywords indexalphabisectedbraidcrossingdeltadiagramsleveling
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In this paper, we introduce a bisected vertex leveling of a plane graph. Using this planar embedding, we present elementary proofs of the well-known upper bounds in terms of the minimal crossing number on braid index $b(L)$ and arc index $\alpha(L)$ for any knot or non-split link $L$, which are $b(L) \leq \frac{1}{2} c(L) + 1$ and $\alpha(L) \leq c(L) + 2$. We also find a quadratic upper bound of the minimal crossing number of delta diagrams of $L$.

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