July to December 2000

**Organisers**: VI Arnold (*Moscow and Parix IX*), JW Bruce (*Liverpool*), V Goryunov (*Liverpool*), D Siersma (*Utrecht*)

July to December 2000

**Organisers: VI Arnold (Moscow and Paris IX), JW Bruce
(Liverpool), D Siersma (Utrecht)**

*Two of the simplest singularities, the crosscap and swallowtail.
The former arises, for example, in projections of surfaces in higher dimensions
to 3-space, in families of projections of a space curve to a plane, and
in boundaries of solution sets to certain differential equations. The latter
in duals of smooth surfaces, families of plane wavefronts and caustics
in 3-space. Their occurence in a wide range of applications is typical.*

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