In mathematics, Mitchell's group is a complex reflection group in 6 complex dimensions of order 108 × 9!, introduced by Mitchell (1914).
As a complex reflection group it has 126 reflections of order 2, and its ring of invariants is a polynomial algebra with generators of degrees 6, 12, 18, 24, 30, 42.
Coxeter gives it group symbol [1 2 3]3 and Coxeter-Dynkin diagram .
[1] Mitchell's group is an index 2 subgroup of the automorphism group of the Coxeter–Todd lattice.
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