ABSTRACT
K =
dt√ (1 – t2)(1 – k2t2)
, K∗ = ∫ 1
dt√ (1 – t2)(1 – k2∗t2)
, k2 + k2∗ = 1.
2.4. Unlimited periodic solutions:
w(z) = 16λ {
1 + 3 tan2 [ 1
√ λ (z + B)]} if λ > 0,
w(z) = – λ 2 cos2
–λ (z + B)] if λ < 0, where B and λ are arbitrary constants.
