合集-python数学建模第3章

摘要：import sympy as sp def solve_difference_equation(): n = sp.symbols('n') x = sp.Function('x') eq = sp.Eq(x(n + 2) - x(n + 1) - 2 * x(n), 0) sol = sp.rs 阅读全文

摘要：import numpy as np from scipy.sparse.linalg import eigs import pylab as plt w = np.array([[0, 1, 0, 1, 1, 1], [0, 0, 0, 1, 1, 1], [1, 1, 0, 1, 0, 0], 阅读全文