Second, solve electromagnetic wave propagation of two-dimension concave objects by symplectic Geometrical Theory, and get better field solutions in caustic field2)comparing with classical GO method.
二利用辛几何理论求解电磁波在二维凹面体散射中的传播问题，与经典的GO解比较，特别在焦散区得到较理想的场解。
Field2: For the second entry field.
field 2：适用于第二个输入字段。
Consider the case of Field2 in more detail.
详细考虑一下Field2的情况。
The supplement from Field2 is applied before the rounding calculation, which enables some interesting effects.
字段2中补充的内容将在舍入计算前被应用，这会产生一些有趣的效果。
The supplement from Field2 is applied before the rounding calculation, which enables some interesting effects.
字段2中补充的内容将在舍入计算前被应用，这会产生一些有趣的效果。
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