Mathematica scripts for "From Matter Density to Deflection Angle and Gravitational Lensing Using Perturbative Method"

Here we have uploaded all the codes required for the computations in the paper. The calculations of the formulas and the generation of the figures in the paper were all carried out using these codes. For the case that the matter distribution can extend to spatial infinity, all codes are in the folder named "Infinite_codes". For the case that the matter exists only within a finite range, all codes are in the folder named "Finite_codes". All figures used in our work are all in the folder named "Figures".本次上传了论文中所有计算所需的代码。论文中的公式推演与图表生成均通过本套代码完成。 针对物质分布可延伸至空间无穷远的场景，相关代码均存放于名为"Infinite_codes"的文件夹中。 针对物质仅局限于有限空间范围内的场景，相关代码均存放于名为"Finite_codes"的文件夹中。 本研究使用的全部图表均存放于名为"Figures"的文件夹中。