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D.5.2.1 symm
Procedure from library chern.lib (see chern_lib).
- Usage:
- symm(l [,n]); l a list of polynomials, n integer
- Return:
- list of polynomials
- Purpose:
- computes the list of elementary symmetric functions in the entries of l
- Note:
- makes sense only for a list of polynomials
Example:
| | LIB "chern.lib";
// elementary symmetric functions in x, y, z:
ring r = 0, (x, y, z), dp;
list l=(x, y, z);
print(symm(l));
//now let us compute only the first two symmetric polynomials in a(1), ... , a(10)
ring q= 0,(a(1..10)), dp;
list l=a(1..10);
print(symm(l, 2));
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