|  |  D.4.22.4 primdecSY Procedure from libraryprimdec.lib(see  primdec_lib).
 
Example:Usage:
primdecSY(I, c); I ideal, c int (optional)
Return:
a list pr of primary ideals and their associated primes for proper ideal I, otherwise pr[1] is list( ideal(1),ideal(1) )'
|  |    pr[i][1]   the i-th primary component,
   pr[i][2]   the i-th prime component.
 | 
 
Note:
Algorithm of Shimoyama/Yokoyama.
For local orderings, the result is considered in the localization
of the polynomial ring, not in the power series ring.|  |    if c=0,  the given ordering of the variables is used,
   if c=1,  minAssChar tries to use an optimal ordering (default),
   if c=2,  minAssGTZ is used,
   if c=3,  minAssGTZ and facstd are used.
 | 
 For local and mixed orderings, the decomposition in the
corresponding global ring is returned if the string 'global'
is specified as third argument
 
 |  | LIB "primdec.lib";
ring  r = 0,(x,y,z),lp;
poly  p = z2+1;
poly  q = z3+2;
ideal i = p*q^2,y-z2;
list pr = primdecSY(i);
pr;
==> [1]:
==>    [1]:
==>       _[1]=z6+4z3+4
==>       _[2]=y-z2
==>    [2]:
==>       _[1]=z3+2
==>       _[2]=y-z2
==> [2]:
==>    [1]:
==>       _[1]=z2+1
==>       _[2]=y-z2
==>    [2]:
==>       _[1]=z2+1
==>       _[2]=y+1
 | 
 
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