M. Chang

activity

20202025

most citedDisjoint direct product decomposition of permutation groups

2 citations · 4 across the 5 of their papers we have counts for

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3 papers · 1 filter

math.GR2021★ 1 cited

Computing normalisers of intransitive groups

Mun See Chang, Christopher Jefferson, Colva M. Roney-Dougal

The normaliser problem takes as input subgroups $G$ and $H$ of the symmetric group $S_{n}$ , and asks one to compute $N_{G} (H)$ . The fastest known algorithm for this problem is simply e…

math.GR2021★ 1 cited

Primitive normalisers in quasipolynomial time

Mun See Chang, Colva M. Roney-Dougal

The normaliser problem has as input two subgroups $H$ and $K$ of the symmetric group $S_{n}$ , and asks for a generating set for $N_{K} (H)$ : it is not known to have a subexponential tim…

math.GR2020★ 2 cited

Disjoint direct product decomposition of permutation groups

Mun See Chang, Christopher Jefferson

Let $H \leq S_{n}$ be an intransitive group with orbits $Ω_{1}, Ω_{2}, \dots, Ω_{k}$ . Then certainly $H$ is a subdirect product of the direct product of its projections on each orbit, $H|…