Properties

Label 1.6.M.4.2a
  
Name \(M(D_2)\)
Weight $1$
Degree $6$
Real dimension $3$
Components $4$
Contained in \(\mathrm{USp}(6)\)
Identity component \(\mathrm{SU}(2)_3\)
Component group \(C_2^2\)

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Invariants

Weight:$1$
Degree:$6$
$\mathbb{R}$-dimension:$3$
Components:$4$
Contained in:$\mathrm{USp}(6)$
Rational:yes

Identity component

Name:$\mathrm{SU}(2)_3$
$\mathbb{R}$-dimension:$3$
Description:$\left\{\begin{bmatrix}\alpha I_3&\beta I_3\\ \gamma I_3& \delta I_3\end{bmatrix}: \begin{bmatrix}\alpha&\beta\\\gamma&\delta\end{bmatrix}\in\mathrm{SU}(2)\right\}$ Symplectic form:$\begin{bmatrix} 0 & I_3\\ -I_3 & 0\end{bmatrix}$
Hodge circle:$u\mapsto \mathrm{diag}(u,u, u, \bar u, \bar u, \bar u)$

Component group

Name:$C_2^2$
Order:$4$
Abelian:yes
Generators:$\begin{bmatrix}1 & 0 & 0 & 0 & 0 & 0 \\0 & -1 & 0 & 0 & 0 & 0 \\0 & 0 & -1 & 0& 0 & 0 \\0 & 0 & 0 & 1 & 0 & 0 \\0 & 0 & 0 & 0 & -1 & 0 \\0 & 0 & 0 & 0 & 0 & -1 \\\end{bmatrix}, \begin{bmatrix}1 & 0 & 0 & 0 & 0 & 0 \\0 & 1 & 0 & 0 & 0 & 0 \\0 & 0 & -1 & 0 & 0 & 0 \\0 & 0 & 0 & 1 & 0 & 0 \\0 & 0 & 0 & 0 & 1 & 0 \\0 &0 & 0 & 0 & 0 & -1 \\\end{bmatrix}$

Subgroups and supergroups

Maximal subgroups:$M(C_2)$${}^{\times 3}$
Minimal supergroups:$M(D_6)$, $M(D_4)$${}^{\times 2}$, $M(A_4)$

Moment sequences

$x$ $\mathrm{E}[x^{0}]$ $\mathrm{E}[x^{1}]$ $\mathrm{E}[x^{2}]$ $\mathrm{E}[x^{3}]$ $\mathrm{E}[x^{4}]$ $\mathrm{E}[x^{5}]$ $\mathrm{E}[x^{6}]$ $\mathrm{E}[x^{7}]$ $\mathrm{E}[x^{8}]$ $\mathrm{E}[x^{9}]$ $\mathrm{E}[x^{10}]$ $\mathrm{E}[x^{11}]$ $\mathrm{E}[x^{12}]$
$a_1$ $1$ $0$ $3$ $0$ $42$ $0$ $915$ $0$ $22974$ $0$ $620046$ $0$ $17537652$
$a_2$ $1$ $3$ $15$ $111$ $1059$ $11493$ $133425$ $1613475$ $20070051$ $255007641$ $3294814317$ $43154242233$ $571650597885$
$a_3$ $1$ $0$ $17$ $0$ $2772$ $0$ $640322$ $0$ $171331468$ $0$ $49904506989$ $0$ $15362989171068$

Moment simplex

$\left(\mathrm{E}\left[a_1^{e_1}a_2^{e_2}a_3^{e_3}\right]:\sum ie_i=2\right)\colon$ $3$ $3$
$\left(\mathrm{E}\left[a_1^{e_1}a_2^{e_2}a_3^{e_3}\right]:\sum ie_i=4\right)\colon$ $15$ $6$ $21$ $42$
$\left(\mathrm{E}\left[a_1^{e_1}a_2^{e_2}a_3^{e_3}\right]:\sum ie_i=6\right)\colon$ $17$ $111$ $57$ $204$ $114$ $426$ $915$
$\left(\mathrm{E}\left[a_1^{e_1}a_2^{e_2}a_3^{e_3}\right]:\sum ie_i=8\right)\colon$ $159$ $1059$ $582$ $330$ $2190$ $1236$ $4740$ $2670$ $10389$ $22974$
$\left(\mathrm{E}\left[a_1^{e_1}a_2^{e_2}a_3^{e_3}\right]:\sum ie_i=10\right)\colon$ $1683$ $11493$ $948$ $6423$ $3618$ $24975$ $14034$ $7902$ $55224$ $30984$ $123021$ $68880$ $275562$ $620046$
$\left(\mathrm{E}\left[a_1^{e_1}a_2^{e_2}a_3^{e_3}\right]:\sum ie_i=12\right)\colon$ $2772$ $18993$ $133425$ $10680$ $74610$ $41838$ $296901$ $23484$ $166032$ $92946$ $665946$ $371790$ $207780$ $1500831$
$$ $836532$ $3395322$ $1889532$ $7705890$ $17537652$

Moment matrix

$\mathrm{E}\left[\chi_i\chi_j\right] = \begin{bmatrix}1&0&2&0&0&0&1&6&0&1&0&3&0&0&10\\0&3&0&3&0&12&0&0&18&0&6&0&21&39&0\\2&0&10&0&6&0&23&33&0&17&0&42&0&0&104\\0&3&0&8&0&22&0&0&33&0&11&0&48&71&0\\0&0&6&0&15&0&30&30&0&33&0&63&0&0&138\\0&12&0&22&0&80&0&0&126&0&52&0&180&280&0\\1&0&23&0&30&0&88&93&0&76&0&174&0&0&400\\6&0&33&0&30&0&93&132&0&87&0&198&0&0&480\\0&18&0&33&0&126&0&0&204&0&87&0&294&462&0\\1&0&17&0&33&0&76&87&0&84&0&171&0&0&392\\0&6&0&11&0&52&0&0&87&0&44&0&132&200&0\\3&0&42&0&63&0&174&198&0&171&0&387&0&0&894\\0&21&0&48&0&180&0&0&294&0&132&0&468&693&0\\0&39&0&71&0&280&0&0&462&0&200&0&693&1085&0\\10&0&104&0&138&0&400&480&0&392&0&894&0&0&2112\end{bmatrix}$

$\ \ \ \mathrm{E}\left[\chi_i^2\right] = \begin{bmatrix}1&3&10&8&15&80&88&132&204&84&44&387&468&1085&2112&1017&1065&2432&1992&541\end{bmatrix}$

Event probabilities

$\mathrm{Pr}[a_i=n]=0$ for $i=1,2,3$ and $n\in\mathbb{Z}$.