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D.15.1.3 mat2arr
Procedure from library arr.lib (see arr_lib).
- Usage:
- mat2arr(M); matrix (M|b)
- Return:
- [arr] interprets the rows of the matrix as the defining polynomial equations
of the arrangement where the last column will be considered as the constant
terms, i.e. if M is an m*(n+1) matrix we have
H_i = Ker( M_i1*x_1 +...+ M_in*x_n + M_i(n+1) ) for i=1...m and
A = {H_1,...,H_m} the resulting arrangement.
Example:
| | LIB "arr.lib";
ring R = 0,(x,y,z),dp;
matrix M[4][4] = 1,0,1,1,1,1,0,2,0,1,1,3,2,1,1,4;
print(M);
==> 1,0,1,1,
==> 1,1,0,2,
==> 0,1,1,3,
==> 2,1,1,4
mat2arr(M);
==> _[1]=x+z+1
==> _[2]=x+y+2
==> _[3]=y+z+3
==> _[4]=2x+y+z+4
==>
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See also:
mat2carr.
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