.subsfunction is quite slow. When I have a long expression
e(can contain nonlinear terms like
e.subs(some_dict)takes quite sometime (a sec or so). In fact subs is often slower than solving for large equations. Am I using
import sympy as sp from sympy import exp, oo sp.init_printing() x = sp.Symbol("x") a, m, h = sp.symbols("a, m, h", positive = True) A = sp.Symbol("A") f = exp(-2 * a * m * x**2 / h) int_f = sp.integrate(f, (x, 0, oo)) eq1 = 2 * (abs(A))**2 * (int_f) - 1 print(sp.solve(eq1, A))
Sum((-1)**(x+1) + (-1)**(x+2) , (x, 1, oo)).is_convergent()is not returning the expected result and raises a TypeError saying Invalid NaN comparison , is this a meaningful error or Am I missing something useful ?Maybe I could raise an issue ?