# Properties

 Label 1216.a Conductor $1216$ Sato-Tate group $\mathrm{USp}(4)$ $$\End(J_{\overline{\Q}}) \otimes \R$$ $$\R$$ $$\End(J_{\overline{\Q}}) \otimes \Q$$ $$\Q$$ $$\End(J) \otimes \Q$$ $$\Q$$ $$\overline{\Q}$$-simple yes $$\mathrm{GL}_2$$-type no

# Related objects

## Genus 2 curves in isogeny class 1216.a

Label Equation
1216.a.1216.1 $$y^2 + (x + 1)y = -x^6 + x^4 - x^3 - x^2$$
1216.a.19456.1 $$y^2 + x^2y = 4x^5 + 3x^4 - 11x^3 - 6x^2 + 6x - 1$$

## L-function data

Analytic rank:$$0$$
Mordell-Weil rank:$$0$$

Prime L-Factor
$$2$$$$1 + T$$
$$19$$$$( 1 - T )( 1 - 2 T + 19 T^{2} )$$

Good L-factors:
Prime L-Factor
$$3$$$$( 1 - 3 T + 3 T^{2} )( 1 + 2 T + 3 T^{2} )$$
$$5$$$$( 1 + 5 T^{2} )( 1 + 4 T + 5 T^{2} )$$
$$7$$$$( 1 - 5 T + 7 T^{2} )( 1 + 4 T + 7 T^{2} )$$
$$11$$$$1 + 10 T^{2} + 121 T^{4}$$
$$13$$$$( 1 - 2 T + 13 T^{2} )( 1 + 7 T + 13 T^{2} )$$
$$17$$$$1 + 3 T + 4 T^{2} + 51 T^{3} + 289 T^{4}$$
$$23$$$$1 - T + 10 T^{2} - 23 T^{3} + 529 T^{4}$$
$$29$$$$( 1 - 9 T + 29 T^{2} )( 1 + 6 T + 29 T^{2} )$$
$\cdots$$\cdots$

## Sato-Tate group

$$\mathrm{ST} =$$ $\mathrm{USp}(4)$

## Decomposition of the Jacobian

Simple over $$\overline{\Q}$$

## Endomorphisms of the Jacobian

Not of $$\GL_2$$-type over $$\Q$$

Endomorphism algebra over $$\Q$$:

 $$\End (J_{}) \otimes \Q$$ $$\simeq$$ $$\Q$$ $$\End (J_{}) \otimes \R$$ $$\simeq$$ $$\R$$

All $$\overline{\Q}$$-endomorphisms of the Jacobian are defined over $$\Q$$.

More complete information on endomorphism algebras and rings can be found on the pages of the individual curves in the isogeny class.