Fungrim entry: 3a77e0

\theta_{2}\!\left(2 z , \tau\right) = \frac{\theta_{2}^{4}\!\left(z, \tau\right) - \theta_{1}^{4}\!\left(z, \tau\right)}{\theta_{2}^{3}\!\left(0, \tau\right)}

Assumptions:

z \in \mathbb{C} \;\mathbin{\operatorname{and}}\; \tau \in \mathbb{H}

TeX:

\theta_{2}\!\left(2 z , \tau\right) = \frac{\theta_{2}^{4}\!\left(z, \tau\right) - \theta_{1}^{4}\!\left(z, \tau\right)}{\theta_{2}^{3}\!\left(0, \tau\right)}

z \in \mathbb{C} \;\mathbin{\operatorname{and}}\; \tau \in \mathbb{H}

Definitions:

Fungrim symbol	Notation	Short description
`JacobiTheta`	$\theta_{j}\!\left(z , \tau\right)$	Jacobi theta function
`Pow`	${a}^{b}$	Power
`CC`	$\mathbb{C}$	Complex numbers
`HH`	$\mathbb{H}$	Upper complex half-plane

Source code for this entry:

Entry(ID("3a77e0"),
    Formula(Equal(JacobiTheta(2, Mul(2, z), tau), Div(Sub(Pow(JacobiTheta(2, z, tau), 4), Pow(JacobiTheta(1, z, tau), 4)), Pow(JacobiTheta(2, 0, tau), 3)))),
    Variables(z, tau),
    Assumptions(And(Element(z, CC), Element(tau, HH))))

Topics using this entry

Argument transformations for Jacobi theta functions