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Basic Notion:" Du Val singularities and other stories"
Tue, April 7, 2009 2:00PM - 3:00PM
| Time: | 2:00PM - 3:00PM |
| Location: | Simons Auditorium |
| Speakers: | Miles Reid, Dr. Miles Reid |
| Abstract: | The ADE Du Val singularities have very many different characterisations, as quotient singularities by finite subgroups G in
SL(2,C), as "simple" singularities in the sense of unfolding, as weighted homogeneous singularities with weights 1/2+1/3+1/5 > 1 (etc.), as singularities with resolution diffeomorphic to their Milnor fibre, and many, many others. They formed the springboard for the study of 3-fold minimal models, and for the Mackay correspondence, and relate to much material that is currently reaching fruition on orbifold cohomology, crepant resolutions, Calabi-Yau geometry and algebra, and much else. I will try to give an informative informal narrative some of the more entertaining adventures of these singularities. The talk is intended in part as service material for Kawamata's seminar at 4:00 pm. |
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