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19 Elliptic IntegralsLegendre’s Integrals19.3 Graphics

Figure 19.3.4 (See in context.)

Figure 19.3.4: E(ϕ,k) as a function of k2 and sin2ϕ for -1k22, 0sin2ϕ1. If sin2ϕ=1 (k2), then the function reduces to E(k), with value 1 at k2=1. If sin2ϕ=1/k2 (<1), then it has the value kE(1/k)+(k2/k)K(1/k), with limit 1 as k21+: put c=k2 in (19.25.7) and use (19.25.1).
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