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object --+ | Polynomial
A class to represent a polynomial in the loop momentum (4-vector) q and how the symmetrized coefficients are ordered. The ordering rule correspond to what is presented in Eq. C.15 of arxiv:hep-ph/1405.0301
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x.__init__(...) initializes x; see help(type(x)) for signature
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Creates a list whose elements are arrays being the coefficient indices. We order this list according to the algorithm in get_coef_position. This coef_list can then be used for the function get_coef_at_position() |
Returns the canonical position for a coefficient characterized by the value of the indices of the loop momentum q it multiplies, that is for example C_01032 multiplying q_0*q_1*q_0*q_3*q_2. We assume that the explicit construction of the position below is faster than a lookup in a table |
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