# Properties

 Label 7927.b Sato-Tate group $\mathrm{USp}(4)$ $$\End(J_{\overline{\Q}}) \otimes \R$$ $$\R$$ $$\End(J_{\overline{\Q}}) \otimes \Q$$ $$\Q$$ $$\overline{\Q}$$-simple yes $$\mathrm{GL}_2$$-type no

# Related objects

## Genus 2 curves in isogeny class 7927.b

Label Equation
7927.b.7927.1 $$y^2 + x^3y = -2x^4 - x^3 + 3x^2 + x - 1$$

## L-function data

Analytic rank:$$2$$  (upper bound)
Mordell-Weil rank:$$2$$

Prime L-Factor
$$7927$$$$( 1 + T )( 1 + 91 T + 7927 T^{2} )$$

Good L-factors:
Prime L-Factor
$$2$$$$( 1 + 2 T^{2} )( 1 + 2 T + 2 T^{2} )$$
$$3$$$$( 1 - T + 3 T^{2} )( 1 + 3 T + 3 T^{2} )$$
$$5$$$$1 + 6 T + 17 T^{2} + 30 T^{3} + 25 T^{4}$$
$$7$$$$1 + 2 T + 2 T^{2} + 14 T^{3} + 49 T^{4}$$
$$11$$$$1 + 5 T + 27 T^{2} + 55 T^{3} + 121 T^{4}$$
$$13$$$$1 + T + 11 T^{2} + 13 T^{3} + 169 T^{4}$$
$$17$$$$1 + 4 T + 23 T^{2} + 68 T^{3} + 289 T^{4}$$
$$19$$$$( 1 - 5 T + 19 T^{2} )( 1 + 5 T + 19 T^{2} )$$
$$23$$$$1 - T + 23 T^{2} - 23 T^{3} + 529 T^{4}$$
$$29$$$$1 + 7 T + 32 T^{2} + 203 T^{3} + 841 T^{4}$$
$\cdots$$\cdots$

## Sato-Tate group

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

## 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.