Raise a polynomial to a power.
Returns the polynomial cs raised to the power pow. The argument cs is a sequence of coefficients ordered from low to high. i.e., [1,2,3] is the series 1 + 2*x + 3*x**2.
Parameters : | cs : array_like
pow : integer
maxpower : integer, optional
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Returns : | coef : ndarray
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See also
chebadd, chebsub, chebmul, chebdiv