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D.14.1.32 arrExponents
Procedure from library arr.lib (see arr_lib).
- Usage:
- arrExponents(A); arr A, multarr A
- Return:
- [intvec] The exponents of a free (multi-) arrangement, i.e. the degrees of a
basis of D(A) the derivation module.
- Note:
- only defined for central arrangements
Example:
| LIB "arr.lib";
ring R = 0,(x,y,z),dp;
arr A3 = arrBoolean(3);
arr B3 = arrTypeB(3);
arr G = ideal(x,y,z,x+y+z);
arrExponents(A3);
==> 1,1,1
arrExponents(B3);
==> 1,3,5
| See also:
arrDer;
arrExponents;
arrIsFree.
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