
Whitney revisited
A Whitney-type cusp and fold theorem is proved for general algebraic surface projections and for sparse univariate polynomial discriminants.
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A Whitney-type cusp and fold theorem is proved for general algebraic surface projections and for sparse univariate polynomial discriminants.

The Galois group of a typical rational function is described and similar problems solved using the topology of braids and tropical geometry.
A uniform approach to a class of varieties is described that includes important types of objects from geometry, optimisation and physics.
The tools used to study polynomial equations with indeterminate coefficients are extended to some important cases with interrelated ones.
Geometric properties, including delta invariants, are computed for singular points defined by polynomials with indeterminate coefficients.
We study the geometry of generic spatial curves with a symmetry in order to understand the Galois group of a family of sparse polynomials.