|
|
D.6.9.1 coDimMap
Procedure from library classifyMapGerms.lib (see classifyMapGerms_lib).
- Usage:
- coDimMap(I, #); I=ideal, #=list
- Compute:
- a bound of the A-determinacy of the map germ defined by I.
- Return:
- a list in which 1st entry gives the bound of the A-determinancy and
the second entry gives the codimension of the map germ defined by I.
- Note:
- if # is empty it computes A^e-codimension(the extended codimension).
Example:
| | LIB "classifyMapGerms.lib";
ring R=0,(x,y),(c,ds);
poly f1=x;
poly f2=xy+y5+y7;
poly f11=f1+f2*f1;
poly f22=f2+f1^2;
map phi=basering,x+y,y+y2;
f1=phi(f11);
f2=phi(f22);
ideal I=f1,f2;
coDimMap(I);
==> [1]:
==> 14
==> [2]:
==> 2
coDimMap(I,1);
==> [1]:
==> 15
==> [2]:
==> 4
|
|
