hyperelliptic(.ncag).info

holonomy group

$\mathrm{D}_4$, order $8$, SmallGroup $[8,3]$ · character table

tangent representation $\rho$

$\rho(g_{1}) = \operatorname{diag}(1, 1, -1, -1)$

$\rho(g_{2}) = \operatorname{diag}(1, 1, -1, -1)$

$\rho(g_{3}) = \operatorname{diag}(1, 1, -1, -1)$

$\rho \cong$ $\chi_{ 1 }$ $\oplus$ $\chi_{ 4 }$ $\oplus$ $\chi_{ 5 }$

order of $\omega_X$

1

number of moduli

3

irregularity $q = \dim \operatorname{Aut}^0(X)$

1

Albanese

the Albanese variety has dimension $1$; the general fiber has dimension $3$ and is an abelian variety or a hyperelliptic variety (details)

$\mathbf{D}^{\mathrm{b}}(X)$

indecomposability open (why)

Hochschild cohomology $\dim \mathrm{HH}^\bullet$

$(1, 2, 3, 10, 16, 10, 3, 2, 1)$

Hodge diamond

polyvector fields $\mathrm{H}^q(X,\bigwedge^p T_X)$