Properties

Label 1.6.L.8.5c
  
Name \(L(J(D_2),D_{2,1})\)
Weight $1$
Degree $6$
Real dimension $6$
Components $8$
Contained in \(\mathrm{USp}(6)\)
Identity component \(\mathrm{U}(1)\times\mathrm{U}(1)_2\)
Component group \(C_2^3\)

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Invariants

Weight:$1$
Degree:$6$
$\mathbb{R}$-dimension:$6$
Components:$8$
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:$C_2^3$
Order:$8$
Abelian:yes
Generators:$\begin{bmatrix}1 & 0 & 0 & 0 & 0 & 0 \\0 & 1 & 0 & 0 & 0 & 0 \\0 & 0 & 0 & 0 &0 & i \\0 & 0 & 0 & 0 & i & 0 \\0 & 0 & 0 & i & 0 & 0 \\0 & 0 & i & 0 & 0 & 0 \\\end{bmatrix}, \begin{bmatrix}1 & 0 & 0 & 0 & 0 & 0 \\0 & 1 & 0 & 0 & 0 & 0 \\0 & 0 & 0 & 1 & 0 & 0 \\0 & 0 & -1 & 0 & 0 & 0 \\0 & 0 & 0 & 0 & 0 & 1 \\0 & 0& 0 & 0 & -1 & 0 \\\end{bmatrix}, \begin{bmatrix}0 & 1 & 0 & 0 & 0 & 0 \\-1 & 0& 0 & 0 & 0 & 0 \\0 & 0 & 0 & 0 & 0 & 1 \\0 & 0 & 0 & 0 & -1 & 0 \\0 & 0 & 0 & -1 & 0 & 0 \\0 & 0 & 1 & 0 & 0 & 0 \\\end{bmatrix}$

Subgroups and supergroups

Maximal subgroups:$L(D_{2,1},C_{2,1})$${}^{\times 2}$, $L_1(D_{2,1})$, $L(J(C_2),C_2)$, $L(D_2,C_2)$, $L(J(C_2),C_{2,1})$${}^{\times 2}$
Minimal supergroups:$L(J(D_4),D_{4,1})$, $L(J(D_6),D_{6,2})$, $L_2(J(D_2))$${}^{\times 3}$, $L(J(D_4),D_{4,2})$${}^{\times 2}$, $L(J(D_6),D_{6,1})$

Moment sequences

$x$ $\mathrm{E}[x^{0}]$ $\mathrm{E}[x^{1}]$ $\mathrm{E}[x^{2}]$ $\mathrm{E}[x^{3}]$ $\mathrm{E}[x^{4}]$ $\mathrm{E}[x^{5}]$ $\mathrm{E}[x^{6}]$ $\mathrm{E}[x^{7}]$ $\mathrm{E}[x^{8}]$ $\mathrm{E}[x^{9}]$ $\mathrm{E}[x^{10}]$ $\mathrm{E}[x^{11}]$ $\mathrm{E}[x^{12}]$
$a_1$ $1$ $0$ $2$ $0$ $27$ $0$ $620$ $0$ $16835$ $0$ $489132$ $0$ $14773374$
$a_2$ $1$ $2$ $10$ $68$ $670$ $7772$ $96757$ $1247108$ $16422490$ $219613460$ $2972099335$ $40611837488$ $559376011135$
$a_3$ $1$ $0$ $11$ $0$ $1809$ $0$ $483620$ $0$ $146261129$ $0$ $47046651876$ $0$ $15736357046916$

Moment simplex

$\left(\mathrm{E}\left[a_1^{e_1}a_2^{e_2}a_3^{e_3}\right]:\sum ie_i=2\right)\colon$ $2$ $2$
$\left(\mathrm{E}\left[a_1^{e_1}a_2^{e_2}a_3^{e_3}\right]:\sum ie_i=4\right)\colon$ $10$ $4$ $13$ $27$
$\left(\mathrm{E}\left[a_1^{e_1}a_2^{e_2}a_3^{e_3}\right]:\sum ie_i=6\right)\colon$ $11$ $68$ $35$ $127$ $72$ $277$ $620$
$\left(\mathrm{E}\left[a_1^{e_1}a_2^{e_2}a_3^{e_3}\right]:\sum ie_i=8\right)\colon$ $97$ $670$ $366$ $209$ $1439$ $811$ $3244$ $1820$ $7370$ $16835$
$\left(\mathrm{E}\left[a_1^{e_1}a_2^{e_2}a_3^{e_3}\right]:\sum ie_i=10\right)\colon$ $1078$ $7772$ $606$ $4308$ $2413$ $17533$ $9778$ $5470$ $40110$ $22330$ $92096$ $51170$ $212009$ $489132$
$\left(\mathrm{E}\left[a_1^{e_1}a_2^{e_2}a_3^{e_3}\right]:\sum ie_i=12\right)\colon$ $1809$ $13042$ $96757$ $7277$ $53578$ $29774$ $222158$ $16570$ $123072$ $68278$ $512498$ $283526$ $157077$ $1184746$
$$ $654605$ $2743440$ $1514016$ $6362118$ $14773374$

Moment matrix

$\mathrm{E}\left[\chi_i\chi_j\right] = \begin{bmatrix}1&0&1&0&0&0&1&4&0&0&0&1&0&0&6\\0&2&0&2&0&7&0&0&11&0&5&0&14&24&0\\1&0&7&0&3&0&13&19&0&12&0&30&0&0&70\\0&2&0&5&0&13&0&0&20&0&8&0&34&47&0\\0&0&3&0&11&0&20&19&0&22&0&46&0&0&98\\0&7&0&13&0&52&0&0&83&0&40&0&132&202&0\\1&0&13&0&20&0&59&61&0&51&0&127&0&0&294\\4&0&19&0&19&0&61&91&0&59&0&147&0&0&358\\0&11&0&20&0&83&0&0&142&0&65&0&220&344&0\\0&0&12&0&22&0&51&59&0&67&0&129&0&0&302\\0&5&0&8&0&40&0&0&65&0&35&0&103&162&0\\1&0&30&0&46&0&127&147&0&129&0&310&0&0&710\\0&14&0&34&0&132&0&0&220&0&103&0&372&553&0\\0&24&0&47&0&202&0&0&344&0&162&0&553&866&0\\6&0&70&0&98&0&294&358&0&302&0&710&0&0&1712\end{bmatrix}$

$\ \ \ \mathrm{E}\left[\chi_i^2\right] = \begin{bmatrix}1&2&7&5&11&52&59&91&142&67&35&310&372&866&1712&851&881&2074&1772&504\end{bmatrix}$

Event probabilities

$-$$a_2\in\mathbb{Z}$$a_2=-1$$a_2=0$$a_2=1$$a_2=2$$a_2=3$
$-$$1$$1/2$$1/8$$0$$0$$0$$3/8$
$a_1=0$$1/2$$1/4$$1/8$$0$$0$$0$$1/8$
$a_3=0$$1/2$$1/4$$1/8$$0$$0$$0$$1/8$
$a_1=a_3=0$$1/2$$1/4$$1/8$$0$$0$$0$$1/8$