u = − eπφ/m = − beπ2/c,
| ch Ω = cos nθ = √ | 1 | , sh Ω = i sin nθ = i √ | eπ2/c | , |
| eπ2/c + 1 | eπ2/c + 1 |
(2)
| e½π2/c = tan nθ, | ½π | ds | = | 2n | . | |
| c | dθ | sin 2nθ |
(3)
For a jet impinging normally on an infinite plane, as in fig. 6, n = 1,
e½π2/c = tan θ, ch (½πs/c) sin 2θ = 1,
(4)
sh ½πx/c = cot θ, sh ½πy/c = tan θ,
sh ½πx/c sh ½πy/c = 1, e½π(x + y)/c = e1/2 πx/c + e1/2 πy/c + 1.