Function: lfunsympow
Section: l_functions
C-Name: lfunsympow
Prototype: GU
Help: lfunsympow(E, m): returns the Ldata structure attached to the
 L-function attached to m-th symmetric power of the elliptic curve E defined
 over the rationals.
Doc: returns the \kbd{Ldata} structure attached to the $L$ function
 attached to the $m$-th symmetric power of the elliptic curve $E$ defined over
 the rationals.
