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J₀(x) = (2/pi) (integrate from 0 to infinity) sin (x . cos ht) dt }
N₀(x) = (-2/pi) (integrate from 0 to infinity) cos (x cos ht) dt }

i H⁽¹⁾₀ (x) = (2/pi) (integrate from 0 to infinity) e^{i x cos ht} dt
= i J₀(x) - N₀(x)

y(x) = (2/pi) (integrate from 0 to i(pi/2)) cos (x cos ht) dt =
y'(x) = (2/pi) (integrate form 0 to i(pi/2)) -sin (x cos ht) d(sin ht)

t-

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