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单词 JacobisIdentityForvarthetaFunctions
释义

Jacobi’s identity for ϑ functions


Jacobi’s identities describe how theta functionsDlmfMathworld transform under replacing the period with the negative of its reciprocal. Together with the quasiperiodicity relations, they describe the transformations of theta functions under the modular group.

θ1(z-1/τ)=-i(-iτ)1/2eiτz2πθ1(τzτ)
θ2(z-1/τ)=(-iτ)1/2eiτz2πθ4(τzτ)
θ3(z-1/τ)=(-iτ)1/2eiτz2πθ3(τzτ)
θ4(z-1/τ)=(-iτ)1/2eiτz2πθ2(τzτ)
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更新时间:2025/5/4 8:32:48