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D.4.6.10 lsum

Procedure from library ellipticcovers.lib (see ellipticcovers_lib).

Usage:
lsum(L); L list

Assume:
L is a list of things with the binary operator + defined.

Return:
The sum of the elements of L.

Theory:
Sums the elements of a list.

Eventually this will be deleted and become a more efficient kernel function.

Example:
 
LIB "ellipticcovers.lib";
list L = 1,2,3,4,5;
lsum(L);
==> 15
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