3 problems

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Nonexistence conjecture for minimal charts with seven white vertices
Nonexistence conjecture. There is no minimal chart with exactly seven white vertices.
Conjectureopen4-manifolds charts surface-braidsarXiv posted 2 days ago
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The nonexistence conjecture for minimal charts with seven white vertices
Nonexistence conjecture. There is no minimal chart with exactly seven white vertices.
Conjectureopencharts low-dimensional-topology surface-braidsarXiv posted 2 days ago
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Non-isotopy conjecture for the full twist closure of sphere braids
Let $B_n(S^2)$ be the braid group of $n$ points on the sphere, with $n\geq 3$ , and let $\Delta^2\in B_n(S^2)$ denote its non-trivial central element. Write $\widehat{\Delta^2}$ for…
Conjectureopenisotopy mapping-class-groups surface-braidsarXiv posted 2 days ago

Nonexistence conjecture for minimal charts with seven white vertices