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math.GT2024
Properties of minimal charts and their applications X: charts of type
Teruo Nagase, Akiko Shima
Charts are oriented labeled graphs in a disk. Any simple surface braid (2-dimensional braid) can be described by using a chart. Also, a chart represents an oriented closed surface…
math.GT2024
Properties of minimal charts and their applications XI: no minimal charts with exactly seven white vertices
Teruo Nagase, Akiko Shima
Charts are oriented labeled graphs in a disk. Any simple surface braid (2-dimensional braid) can be described by using a chart. Also, a chart represents an oriented closed surface…