Existence of short simple separating cycles in random high-genus triangulations
Existence of short simple separating cycles in random high-genus triangulations
Fix and a sequence such that . Let be a uniform triangulation of genus with faces. A simple separating non-contractible cycle is a simple cycle that is separating and non-contractible. The short simple separating cycle conjecture. For every , there exists a constant such that, with high probability, contains a simple, non-contractible, separating cycle of length less than .
The theorem preceding this conjecture proves only logarithmic upper and lower bounds for the unrestricted separating systole. This conjecture would establish a logarithmically short simple separating cycle in the random model, despite the deterministic existence problem remaining open.
Sources & referencesView supporting material
Primary source
Baptiste Louf, “The separating systole and the genus ratio of high genus triangulations”, arXiv:2512.05068 (2025).
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