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path: root/symbolic/D2Q9.py
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from sympy import *

q = 9
d = 2

c = [ Matrix(x) for x in [(-1, 1), ( 0, 1), ( 1, 1), (-1, 0), ( 0, 0), ( 1, 0), (-1,-1), ( 0, -1), ( 1, -1)] ]

c_s = sqrt(Rational(1,3))