Coset/Examples/Symmetry Group of Equilateral Triangle/Cosets of Reflection Subgroup/Transversals
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Examples of Cosets
Consider the symmetry group of the equilateral triangle $D_3$.
Let $H \subseteq D_3$ be defined as:
- $H = \set {e, r}$
where:
- $e$ denotes the identity mapping
- $r$ denotes reflection in the line $r$.
Some of the left transversals of $H$ are given by:
- $\set {e, s, t}$
- $\set {e, q, p}$
- $\set {r, s, p}$
and so on.
Sources
- 1965: J.A. Green: Sets and Groups ... (previous) ... (next): $\S 6.3$. Index. Transversals: Example $116$