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D.6.12.1 tau_es
Procedure from library equising.lib (see equising_lib).
- Usage:
- tau_es(f); f poly
- Assume:
- f is a reduced bivariate polynomial, the basering has precisely
two variables, is local and no qring.
- Return:
- int, the codimension of the mu-const stratum in the semi-universal
deformation base.
- Note:
- printlevel>=1 displays additional information.
When called with any additional parameter, the computation of the
Milnor number is avoided (no check for NND).
Example:
| | LIB "equising.lib";
ring r=32003,(x,y),ds;
poly f=(x4-y4)^2-x10;
tau_es(f);
==> 42
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See also:
esIdeal;
invariants;
tjurina.
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