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Conjugacy classes may be referred to by describing them, or more briefly by abbreviations such as "6A", meaning "a certain conjugacy class with elements of order 6", and "6B" would be a different conjugacy class with elements of order 6; the conjugacy class 1A is the conjugacy class of the identity which has order 1.
We can easily distinguish three kinds of permutations of the three blocks, the conjugacy classes of the group: no change (), a group element of order 1; interchanging two blocks: (RG), (RB), (GB), three group elements of order 2; a cyclic permutation of all three blocks: (RGB), (RBG), two group elements of order 3
All the reflections are conjugate to each other whenever n is odd, but they fall into two conjugacy classes if n is even. If we think of the isometries of a regular n-gon: for odd n there are rotations in the group between every pair of mirrors, while for even n only half of the mirrors can be reached from one by these rotations. Geometrically ...
Suzuki showed that the Suzuki group has q+3 conjugacy classes. Of these, q+1 are strongly real, and the other two are classes of elements of order 4. q 2 +1 Sylow 2-subgroups of order q 2, of index q–1 in their normalizers. 1 class of elements of order 2, 2 classes of elements of order 4.
The irreducible complex characters of a finite group form a character table which encodes much useful information about the group G in a concise form. Each row is labelled by an irreducible character and the entries in the row are the values of that character on any representative of the respective conjugacy class of G (because characters are class functions).
If a finite group G has exactly two conjugacy classes of involutions with representatives t and z, then the Thompson order formula (Aschbacher 2000, 45.6) (Suzuki 1986, 5.1.7) states
In D 12 reflections no longer correspond to Sylow 2-subgroups, and fall into two conjugacy classes. By contrast, if n is even, then 4 divides the order of the group, and the subgroups of order 2 are no longer Sylow subgroups, and in fact they fall into two conjugacy classes, geometrically according to whether they pass through two vertices or ...
Sending bijects conjugacy classes, so and have the same size and merely permutes terms in the sum for . Therefore λ χ {\displaystyle \lambda _{\chi }} is fixed for all automorphisms of Q ( ζ ) {\displaystyle \mathbb {Q} (\zeta )} , so λ χ {\displaystyle \lambda _{\chi }} is rational and thus integral.