教程
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小科普之epimorphism in Grp is surjective
This proof is due to Arturo Magidin. In category theory, as we don't consider the 'internal structure' of objects, many properties of maps are defined in an abstract way using interaction with other morphisms. 'Epimorphism' is such an analog of sur…… -
数学建模 分享
如题,笔者作为队伍中的编程手,将在此分享自己的准备历程。队伍准备打MothorCup和电工杯,最终在9月份参加国赛。 3.15 线性规划模型: from scipy import optimize import numpy as np c = np.array([-4,-3]) # 默认求最小值 所以求最大值时需要加 - A = np.array([……