ences of coefficients, from lowest order "term" to highest,
e.g., [1,2,3] represents the series ``P_0 + 2*P_1 + 3*P_2``.

Parameters
----------
c1, c2 : array_like
    1-D arrays of Legendre series coefficients ordered from low to
    high.

Returns
-------
out : ndarray
    Of Legendre series coefficients representing their product.

See Also
--------
legadd, legsub, legmulx, legdiv, legpow

Notes
-----
In general, the (polynomial) product of two C-series results in terms
that are not in the Legendre polynomial basis set.  Thus, to express
the product as a Legendre series, it is necessary to "reproject" the
product onto said basis set, which may produce "unintuitive" (but
correct) results; see Examples section below.

Examples
--------
>>> from numpy.polynomial import legendre as L
>>> c1 = (1,2,3)
>>> c2 = (3,2)
>>> L.legmul(c1,c2) # multiplication requires "reprojection"
array([  4.33333333,  10.4       ,  11.66666667,   3.6       ]) # may vary

r