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of a simplex $\sigma$ of a triangulation $T$

The set $\text{ln}(\sigma,T)$ of those simplices from the closed star $\text{St}(\sigma,T)$ (the union of the simplices in $T$ containing $\sigma$) which do not intersect $\sigma$ or any face of $\sigma$.

Comments[edit]

Cf. also Simplex (abstract).