Outline
Examples
Ext
Primdec
Normalize
MuPAD
Deform
Classify
Monodromy
Kodaira
Puiseux
D
k
Singularities
D
k
:
x
1
(x
1
k-2
+ x
2
2
) +x
3
2
+ ... + x
n
2
,
k >= 4
Real Pictures: n=3;
x
1
(x
1
k-2
-x
2
2
)
+x
3
2
=0
D
4
D
5
D
6
D
7
Dynkin Diagram:
A
k
,
E
k
Hannover
http://www.singular.uni-kl.de