Properties

Label 1.6.L.16.11h
  
Name \(L_2(D_4)\)
Weight $1$
Degree $6$
Real dimension $6$
Components $16$
Contained in \(\mathrm{USp}(6)\)
Identity component \(\mathrm{U}(1)\times\mathrm{U}(1)_2\)
Component group \(C_2\times D_4\)

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Invariants

Weight:$1$
Degree:$6$
$\mathbb{R}$-dimension:$6$
Components:$16$
Contained in:$\mathrm{USp}(6)$
Rational:yes

Identity component

Name:$\mathrm{U}(1)\times\mathrm{U}(1)_2$
$\mathbb{R}$-dimension:$6$
Description:$\left\{\begin{bmatrix}A&0&0\\0&\alpha I_2&0\\0&0&\bar\alpha I_2\end{bmatrix}: A\in\mathrm{U}(1)\subseteq\mathrm{SU}(2),\ \alpha\bar\alpha = 1,\ \alpha\in\mathbb{C}\right\}$ Symplectic form:$\begin{bmatrix}J_2&0&0\\0&0&I_2\\0&-I_2&0\end{bmatrix},\ J_2:=\begin{bmatrix}0&1\\-1&0\end{bmatrix}$
Hodge circle:$u\mapsto\mathrm{diag}(u,\bar u, u, u,\bar u, \bar u)$

Component group

Name:$C_2\times D_4$
Order:$16$
Abelian:no
Generators:$\begin{bmatrix}1 & 0 & 0 & 0 & 0 & 0 \\0 & 1 & 0 & 0 & 0 & 0 \\0 & 0 & 0 & 1 &0 & 0 \\0 & 0 & -1 & 0 & 0 & 0 \\0 & 0 & 0 & 0 & 0 & 1 \\0 & 0 & 0 & 0 & -1 & 0 \\\end{bmatrix}, \begin{bmatrix}1 & 0 & 0 & 0 & 0 & 0 \\0 & 1 & 0 & 0 & 0 & 0 \\0 & 0 & \zeta_{8}^{1} & 0 & 0 & 0 \\0 & 0 & 0 & \zeta_{8}^{7} & 0 & 0 \\0 & 0 & 0 & 0 & \zeta_{8}^{7} & 0 \\0 & 0 & 0 & 0 & 0 & \zeta_{8}^{1} \\\end{bmatrix}, \begin{bmatrix}0 & 1 & 0 & 0 & 0 & 0 \\-1 & 0 & 0 & 0 & 0 & 0 \\0 & 0 & 1 & 0 & 0 & 0 \\0 & 0 & 0 & 1 & 0 & 0 \\0 & 0 & 0 & 0 & 1 & 0 \\0 & 0 & 0 & 0 & 0 & 1 \\\end{bmatrix}$

Subgroups and supergroups

Maximal subgroups:$L_2(C_4)$, $L(D_4,C_4)$, $L_1(D_4)$, $L_2(D_2)$${}^{\times 2}$, $L(D_4,D_2)$${}^{\times 2}$
Minimal supergroups:$L_2(O)$, $L_2(J(D_4))$

Moment sequences

$x$ $\mathrm{E}[x^{0}]$ $\mathrm{E}[x^{1}]$ $\mathrm{E}[x^{2}]$ $\mathrm{E}[x^{3}]$ $\mathrm{E}[x^{4}]$ $\mathrm{E}[x^{5}]$ $\mathrm{E}[x^{6}]$ $\mathrm{E}[x^{7}]$ $\mathrm{E}[x^{8}]$ $\mathrm{E}[x^{9}]$ $\mathrm{E}[x^{10}]$ $\mathrm{E}[x^{11}]$ $\mathrm{E}[x^{12}]$
$a_1$ $1$ $0$ $3$ $0$ $33$ $0$ $570$ $0$ $12495$ $0$ $314748$ $0$ $8668968$
$a_2$ $1$ $2$ $10$ $65$ $555$ $5582$ $62296$ $743465$ $9283931$ $119681030$ $1578937950$ $21194304155$ $288293747517$
$a_3$ $1$ $0$ $13$ $0$ $1386$ $0$ $291220$ $0$ $79530290$ $0$ $24452628228$ $0$ $8011397211048$

Moment simplex

$\left(\mathrm{E}\left[a_1^{e_1}a_2^{e_2}a_3^{e_3}\right]:\sum ie_i=2\right)\colon$ $2$ $3$
$\left(\mathrm{E}\left[a_1^{e_1}a_2^{e_2}a_3^{e_3}\right]:\sum ie_i=4\right)\colon$ $10$ $5$ $16$ $33$
$\left(\mathrm{E}\left[a_1^{e_1}a_2^{e_2}a_3^{e_3}\right]:\sum ie_i=6\right)\colon$ $13$ $65$ $38$ $126$ $75$ $264$ $570$
$\left(\mathrm{E}\left[a_1^{e_1}a_2^{e_2}a_3^{e_3}\right]:\sum ie_i=8\right)\colon$ $93$ $555$ $323$ $195$ $1171$ $690$ $2552$ $1490$ $5620$ $12495$
$\left(\mathrm{E}\left[a_1^{e_1}a_2^{e_2}a_3^{e_3}\right]:\sum ie_i=10\right)\colon$ $863$ $5582$ $504$ $3212$ $1865$ $12295$ $7075$ $4100$ $27429$ $15730$ $61580$ $35175$ $138922$ $314748$
$\left(\mathrm{E}\left[a_1^{e_1}a_2^{e_2}a_3^{e_3}\right]:\sum ie_i=12\right)\colon$ $1386$ $9055$ $62296$ $5208$ $35339$ $20147$ $140330$ $11522$ $79452$ $45140$ $317999$ $179550$ $101745$ $723412$
$$ $407456$ $1651020$ $927738$ $3778530$ $8668968$

Moment matrix

$\mathrm{E}\left[\chi_i\chi_j\right] = \begin{bmatrix}1&0&1&0&1&0&1&3&0&1&0&2&0&0&4\\0&3&0&2&0&8&0&0&9&0&6&0&10&18&0\\1&0&7&0&5&0&13&14&0&7&0&25&0&0&44\\0&2&0&6&0&12&0&0&13&0&6&0&27&30&0\\1&0&5&0&11&0&15&18&0&15&0&35&0&0&60\\0&8&0&12&0&44&0&0&56&0&32&0&88&130&0\\1&0&13&0&15&0&45&41&0&27&0&86&0&0&174\\3&0&14&0&18&0&41&60&0&40&0&97&0&0&208\\0&9&0&13&0&56&0&0&90&0&43&0&128&203&0\\1&0&7&0&15&0&27&40&0&45&0&71&0&0&170\\0&6&0&6&0&32&0&0&43&0&29&0&63&103&0\\2&0&25&0&35&0&86&97&0&71&0&201&0&0&404\\0&10&0&27&0&88&0&0&128&0&63&0&231&317&0\\0&18&0&30&0&130&0&0&203&0&103&0&317&497&0\\4&0&44&0&60&0&174&208&0&170&0&404&0&0&942\end{bmatrix}$

$\ \ \ \mathrm{E}\left[\chi_i^2\right] = \begin{bmatrix}1&3&7&6&11&44&45&60&90&45&29&201&231&497&942&476&471&1117&947&292\end{bmatrix}$

Event probabilities

$-$$a_2\in\mathbb{Z}$$a_2=-1$$a_2=0$$a_2=1$$a_2=2$$a_2=3$
$-$$1$$0$$0$$0$$0$$0$$0$
$a_1=0$$5/16$$0$$0$$0$$0$$0$$0$
$a_3=0$$5/16$$0$$0$$0$$0$$0$$0$
$a_1=a_3=0$$5/16$$0$$0$$0$$0$$0$$0$