... 366 Mixed Boundary Value Problems 2bzr2aFigure 5.1 .4: Schematicof the geometry in Example 5.1 .4. u(b, z)=0,u(a−,z)=u(a+,z), −∞ <z<∞, ... tanh(β)φ(0,b), (5.1. 144 )andΦ−(α, b−) −α tanh(β)Φ−(α, b−)=i tanh(β)φ(0,b), (5.1. 145 )because φ(0,b−)=φ(0,b+)=φ(0,b). Using Equation 5.1. 144 and Equation5.1. 145 in conjunction with ... ikeikzdk =0, 0 <z<∞, (5.1.92)© 2008 by Taylor & Francis Group, LLC3 54 Mixed Boundary Value Problems • Example 5.1.1Given that h, β > 0, let us solve the partial differential...