Properties

Label 1.6.K.4.2b
  
Name \(\mathrm{SU}(2)\times J(C_2)\)
Weight $1$
Degree $6$
Real dimension $4$
Components $4$
Contained in \(\mathrm{USp}(6)\)
Identity component \(\mathrm{SU}(2)\times\mathrm{U}(1)_2\)
Component group \(C_2^2\)

Downloads

Learn more

Invariants

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

Identity component

Name:$\mathrm{SU}(2)\times\mathrm{U}(1)_2$
$\mathbb{R}$-dimension:$4$
Description:$\left\{\begin{bmatrix}A&0&0\\0&\alpha I_2&0\\0&0&\bar\alpha I_2\end{bmatrix}: A\in\mathrm{SU}(2),\ \alpha\bar\alpha = 1,\ \alpha\in\mathbb{C}\right\}$ 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:$C_2^2$
Order:$4$
Abelian:yes
Generators:$\begin{bmatrix}1 & 0 & 0 & 0 & 0 & 0 \\0 & 1 & 0 & 0 & 0 & 0 \\0 & 0 & i & 0 &0 & 0 \\0 & 0 & 0 & -i & 0 & 0 \\0 & 0 & 0 & 0 & -i & 0 \\0 & 0 & 0 & 0 & 0 & i \\\end{bmatrix}, \begin{bmatrix}1 & 0 & 0 & 0 & 0 & 0 \\0 & 1 & 0 & 0 & 0 & 0 \\0 & 0 & 0 & 0 & 0 & 1 \\0 & 0 & 0 & 0 & -1 & 0 \\0 & 0 & 0 & -1 & 0 & 0 \\0 & 0 & 1 & 0 & 0 & 0 \\\end{bmatrix}$

Subgroups and supergroups

Maximal subgroups:$\mathrm{SU}(2)\times C_{2,1}$, $\mathrm{SU}(2)\times J(C_1)$, $\mathrm{SU}(2)\times C_2$
Minimal supergroups:$\mathrm{SU}(2)\times J(D_2)$${}^{\times 3}$, $\mathrm{SU}(2)\times J(D_3)$, $\mathrm{SU}(2)\times J(C_4)$, $\mathrm{SU}(2)\times J(C_6)$

Moment sequences

$x$ $\mathrm{E}[x^{0}]$ $\mathrm{E}[x^{1}]$ $\mathrm{E}[x^{2}]$ $\mathrm{E}[x^{3}]$ $\mathrm{E}[x^{4}]$ $\mathrm{E}[x^{5}]$ $\mathrm{E}[x^{6}]$ $\mathrm{E}[x^{7}]$ $\mathrm{E}[x^{8}]$ $\mathrm{E}[x^{9}]$ $\mathrm{E}[x^{10}]$ $\mathrm{E}[x^{11}]$ $\mathrm{E}[x^{12}]$
$a_1$ $1$ $0$ $3$ $0$ $38$ $0$ $745$ $0$ $17094$ $0$ $427014$ $0$ $11289564$
$a_2$ $1$ $2$ $12$ $83$ $750$ $7697$ $84989$ $981766$ $11707026$ $143022917$ $1781477919$ $22546777596$ $289206317739$
$a_3$ $1$ $0$ $15$ $0$ $1878$ $0$ $386170$ $0$ $94401258$ $0$ $25461220092$ $0$ $7330330362168$

Moment simplex

$\left(\mathrm{E}\left[a_1^{e_1}a_2^{e_2}a_3^{e_3}\right]:\sum ie_i=2\right)\colon$ $2$ $3$
$\left(\mathrm{E}\left[a_1^{e_1}a_2^{e_2}a_3^{e_3}\right]:\sum ie_i=4\right)\colon$ $12$ $5$ $18$ $38$
$\left(\mathrm{E}\left[a_1^{e_1}a_2^{e_2}a_3^{e_3}\right]:\sum ie_i=6\right)\colon$ $15$ $83$ $46$ $160$ $92$ $340$ $745$
$\left(\mathrm{E}\left[a_1^{e_1}a_2^{e_2}a_3^{e_3}\right]:\sum ie_i=8\right)\colon$ $117$ $750$ $425$ $250$ $1581$ $918$ $3466$ $2005$ $7670$ $17094$
$\left(\mathrm{E}\left[a_1^{e_1}a_2^{e_2}a_3^{e_3}\right]:\sum ie_i=10\right)\colon$ $1166$ $7697$ $668$ $4399$ $2532$ $16904$ $9704$ $5595$ $37646$ $21590$ $84290$ $48244$ $189420$ $427014$
$\left(\mathrm{E}\left[a_1^{e_1}a_2^{e_2}a_3^{e_3}\right]:\sum ie_i=12\right)\colon$ $1878$ $12444$ $84989$ $7138$ $48375$ $27636$ $190177$ $15810$ $108264$ $61753$ $428092$ $243353$ $138630$ $966747$
$$ $548786$ $2188760$ $1240722$ $4966164$ $11289564$

Moment matrix

$\mathrm{E}\left[\chi_i\chi_j\right] = \begin{bmatrix}1&0&1&0&1&0&1&5&0&1&0&2&0&0&6\\0&3&0&2&0&10&0&0&13&0&7&0&14&27&0\\1&0&9&0&5&0&17&20&0&9&0&35&0&0&64\\0&2&0&8&0&16&0&0&17&0&8&0&37&46&0\\1&0&5&0&14&0&21&25&0&21&0&49&0&0&86\\0&10&0&16&0&60&0&0&80&0&44&0&124&184&0\\1&0&17&0&21&0&61&59&0&40&0&122&0&0&242\\5&0&20&0&25&0&59&88&0&55&0&132&0&0&284\\0&13&0&17&0&80&0&0&129&0&60&0&176&277&0\\1&0&9&0&21&0&40&55&0&57&0&99&0&0&220\\0&7&0&8&0&44&0&0&60&0&40&0&91&140&0\\2&0&35&0&49&0&122&132&0&99&0&280&0&0&544\\0&14&0&37&0&124&0&0&176&0&91&0&312&428&0\\0&27&0&46&0&184&0&0&277&0&140&0&428&654&0\\6&0&64&0&86&0&242&284&0&220&0&544&0&0&1192\end{bmatrix}$

$\ \ \ \mathrm{E}\left[\chi_i^2\right] = \begin{bmatrix}1&3&9&8&14&60&61&88&129&57&40&280&312&654&1192&546&577&1265&987&279\end{bmatrix}$

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$$1/4$$0$$0$$0$$1/4$
$a_1=0$$0$$0$$0$$0$$0$$0$$0$
$a_3=0$$0$$0$$0$$0$$0$$0$$0$
$a_1=a_3=0$$0$$0$$0$$0$$0$$0$$0$