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D.5.5.10 displayInvariants

Procedure from library hnoether.lib (see hnoether_lib).

Usage:
displayInvariants(L); L list

Assume:
L is the output of develop(f), or of extdevelop(develop(f),n), or (one entry of) the output of reddevelop(f).

Return:
none

Display:
invariants of the corresponding branch, resp. of all branches, in a better readable form.

Example:
 
LIB "hnoether.lib";
ring exring=0,(x,y),dp;
list hne=develop(y4+2x3y2+x6+x5y);
==> h(0) = 1
==> a(1,2) = -1
==> h(1) = 2
==> a(2,2) = -1
==> a(2,3) = -2
displayInvariants(hne);
==>  characteristic exponents  : 4,6,7
==>  generators of semigroup   : 4,6,13
==>  Puiseux pairs             : (3,2)(7,2)
==>  degree of the conductor   : 16
==>  delta invariant           : 8
==>  sequence of multiplicities: 4,2,2,1
See also: develop; intersection; invariants; reddevelop.


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