2018-03-28 11:52:50 +03:00
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(k^(-1) - (2*(1 - 1/Sqrt[1 + k^2/(c - I*k0)^2]))/k - 1/(k*Sqrt[1 + k^2/(2*c - I*k0)^2]) + Sqrt[Pi]*((I*Piecewise[{{k0/(Sqrt[k^2 - k0^2]*Sqrt[Pi]), k0^2/k^2 < 1}}, 0])/k + Piecewise[{{(k0*(1 - k0/Sqrt[-k^2 + k0^2]))/(k*Sqrt[Pi]), k^2/k0^2 < 1}, {k0/(k*Sqrt[Pi]), k^2/k0^2 > 1}}, 0]/k0))/k0
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Piecewise[{{SeriesData[k, Infinity, {(3*c^2*(c - I*k0))/(k^2*k0), 0, (15*(-3*c^5 + (7*I)*c^4*k0 + 6*c^3*k0^2 - (2*I)*c^2*k0^3))/(4*k^2*k0), 0, (35*(9*c^7 - (31*I)*c^6*k0 - 45*c^5*k0^2 + (35*I)*c^4*k0^3 + 15*c^3*k0^4 - (3*I)*c^2*k0^5))/(8*k^2*k0), 0, (105*(-85*c^9 + (381*I)*c^8*k0 + 756*c^7*k0^2 - (868*I)*c^6*k0^3 - 630*c^5*k0^4 + (294*I)*c^4*k0^5 + 84*c^3*k0^6 - (12*I)*c^2*k0^7))/(64*k^2*k0), 0, (693*(93*c^11 - (511*I)*c^10*k0 - 1275*c^9*k0^2 + (1905*I)*c^8*k0^3 + 1890*c^7*k0^4 - (1302*I)*c^6*k0^5 - 630*c^5*k0^6 + (210*I)*c^4*k0^7 + 45*c^3*k0^8 - (5*I)*c^2*k0^9))/(128*k^2*k0)}, 2, 11, 1], (k0 <= 0 && k^2/k0^2 > 1) || k0 > 0}}, SeriesData[k, Infinity, {I/k^2, 0, (I/2*((-6*I)*c^3 - 6*c^2*k0 + k0^3))/(k^2*k0), 0, ((I/2*(6*c^3 - I*c^2*k0 + 6*c*k0^2 - (3*I)*k0^3)*((-I/2*(c - I*k0)*(2*c - I*k0)*k0^2)/k^2 - I*(-((c - I*k0)^3*(2*c - I*k0))/(2*k^2) - ((c - I*k0)*(2*c - I*k0)^3)/(2*k^2) + ((c - I*k0)*(2*c - I*k0)*k0^2)/(2*k^2))))/((c - I*k0)*(2*c - I*k0)) - (k0*(((-3*I)/8*(c - I*k0)*(2*c - I*k0)*k0^4)/k^2 - I/2*k0^2*(-((c - I*k0)^3*(2*c - I*k0))/(2*k^2) - ((c - I*k0)*(2*c - I*k0)^3)/(2*k^2) + ((c - I*k0)*(2*c - I*k0)*k0^2)/(2*k^2)) - I*(((c - I*k0)^3*(2*c - I*k0)^3)/(4*k^2) + ((-((c - I*k0)^3*(2*c - I*k0))/(2*k^2) - ((c - I*k0)*(2*c - I*k0)^3)/(2*k^2))*k0^2)/2 + (3*(c - I*k0)*(2*c - I*k0)*k0^4)/(8*k^2) + (3*(c - I*k0)^4*(2*c - I*k0)*(c/k - (I*k0)/k))/(8*k) + (3*(c - I*k0)*(2*c - I*k0)^4*((2*c)/k - (I*k0)/k))/(8*k))))/((c - I*k0)*(2*c - I*k0)) + (I*(c - I*k0)*(2*c - I*k0)*((-I/8*k0^4)/(c - I*k0) - I/2*k0^2*((c - I*k0)/2 - k0^2/(2*(c - I*k0))) + I*(-(c - I*k0)^3/8 - ((c - I*k0)*k0^2)/4 - k0^4/(8*(c - I*k0))) + k0*(-(c - I*k0)^3/(8*(2*c - I*k0)) + ((c - I*k0)*(2*c - I*k0))/4 - (2*c - I*k0)^3/(8*(c - I*k0)) - (((c - I*k0)/(2*(2*c - I*k0)) + (2*c - I*k0)/(2*(c - I*k0)))*k0^2)/2 - k0^4/(8*(c - I*k0)*(2*c - I*k0))) - I*k0*(I*(-(c - I*k0)^3/(8*(2*c - I*k0)) + ((c - I*k0)*(2*c - I*k0))/4 - (2*c - I*k0)^3/(8*(c - I*k0))) - I/2*((c - I*k0)/(2*(2*c - I*k0)) + (2*c - I*k0)/(2*(c - I*k0)))*k0^2 - (I/8*k0^4)/((c - I*k0)*(2*c - I*k0))) - 2*((-I/8*k0^4)/(2*c - I*k0) - I/2*k0^2*((2*c - I*k0)/2 - k0^2/(2*(2*c - I*k0))) + I*(-(2*c - I*k0)^3/8 - ((2*c - I*k0)*k0^2)/4 - k0^4/(8*(2*c - I*k0))))))/k^2)/k0, 0, ((I/2*(6*c^3 - I*c^2*k0 + 6*c*k0^2 - (3*I)*k0^3)*(((-3*I)/8*(c - I*k0)*(2*c - I*k0)*k0^4)/k^2 - I/2*k0^2*(-((c - I*k0)^3*(2*c - I*k0))/(2*k^2) - ((c - I*k0)*(2*c - I*k0)^3)/(2*k^2) + ((c - I*k0)*(2*c - I*k0)*k0^2)/(2*k^2)) - I*(((c - I*k0)^3*(2*c - I*k0)^3)/(4*k^2) + ((-((c - I*k0)^3*(2*c - I*k0))/(2*k^2) - ((c - I*k0)*(2*c - I*k0)^3)/(2*k^2))*k0^2)/2 + (3*(c - I*k0)*(2*c - I*k0)*k0^4)/(8*k^2) + (3*(c - I*k0)^4*(2*c - I*k0)*(c/k - (I*k0)/k))/(8*k) + (3*(c - I*k0)*(2*c - I*k0)^4*((2*c)/k - (I*k0)/k))/(8*k))))/((c - I*k0)*(2*c - I*k0)) - ((-I/2*(c - I*k0)*(2*c - I*k0)*k0^2)/k^2 - I*(-((c - I*k0)^3*(2*c - I*k0))/(2*k^2) - ((c - I*k0)*(2*c - I*k0)^3)/(2*k^2) + ((c - I*k0)*(2*c - I*k0)*k0^2)/(2*k^2)))*((-I/8*k0^4)/(c - I*k0) - I/2*k0^2*((c - I*k0)/2 - k0^2/(2*(c - I*k0))) + I*(-(c - I*k0)^3/8 - ((c - I*k0)*k0^2)/4 - k0^4/(8*(c - I*k0))) + k0*(-(c - I*k0)^3/(8*(2*c - I*k0)) + ((c - I*k0)*(2*c - I*k0))/4 - (2*c - I*k0)^3/(8*(c - I*k0)) - (((c - I*k0)/(2*(2*c - I*k0)) + (2*c - I*k0)/(2*(c - I*k0)))*k0^2)/2 - k0^4/(8*(c - I*k0)*(2*c - I*k0))) - I*k0*(I*(-(c - I*k0)^3/(8*(2*c - I*k0)) + ((c - I*k0)*(2*c - I*k0))/4 - (2*c - I*k0)^3/(8*(c - I*k0))) - I/2*((c - I*k0)/(2*(2*c - I*k0)) + (2*c - I*k0)/(2*(c - I*k0)))*k0^2 - (I/8*k0^4)/((c - I*k0)*(2*c - I*k0))) - 2*((-I/8*k0^4)/(2*c - I*k0) - I/2*k0^2*((2*c - I*k0)/2 - k0^2/(2*(2*c - I*k0))) + I*(-(2*c - I*k0)^3/8 - ((2*c - I*k0)*k0^2)/4 - k0^4/(8*(2*c - I*k0))))) + (I*(c - I*k0)*(2*c - I*k0)*((-I/16*k0^6)/(c - I*k0) - I/8*k0^4*((c - I*k0)/2 - k0^2/(2*(c - I*k0))) - I/2*k0^2*(-(c - I*k0)^3/8 - ((c - I*k0)*k0^2)/4 - k0^4/(8*(c - I*k0))) + I*((c - I*k0)^5/16 + ((c - I*k0)^3*k0^2)/16 - ((c - I*k0)*k0^4)/16 - k0^6/(16*(c - I*k0))) + k0*((c - I*k0)^5/(16*(2*c - I*k0)) - ((c - I*k0)^3*(2*c - I*k0))/16 - ((c - I*k0)*(2*c - I*k0)^3)/16 + (2*c - I*k0)^5/(16*(c - I*k0)) - ((-(c - I*k0)^3/(8*(2*c - I*k0)) + ((c - I*k0)*(2*c
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