Differential Equation satisfied by Weierstrass's Elliptic Function
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Theorem
- $\paren {\dfrac {\d f} {\d z} }^2 = 4 f^3 - g_2 f - g_3$
where:
- $\ds g_2 = 60 \sum_{\tuple {n, m} \mathop \in \Z^2 \setminus \tuple {0, 0} } \frac 1 {\paren {2 m \omega_1 + 2 n \omega_2}^4}$
and:
- $\ds g_3 = 140 \sum_{\tuple {n, m} \mathop \in \Z^2 \setminus \tuple {0, 0} } \frac 1 {\paren {2 m \omega_1 + 2 n \omega_2}^6}$
has the general solution:
- $\map f z = \map \wp {z + C; \omega_1, \omega_2}$
where:
- $\wp$ is Weierstrass's elliptic function
- $C$ is an arbitrary constant
- $\omega_1$, $\omega_2$ are constants independent of $z$.
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Proof
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Sources
- 1920: E.T. Whittaker and G.N. Watson: A Course of Modern Analysis (3rd ed.): $20.22$: The differential equation satisfied by $\map \wp z$