= Ivan Smith
{c}
<Ivan Smith> works on <symplectic topology>. His Cambridge profile identifies him as a geometer working in that subject.https://www.maths.cam.ac.uk/person/is200/1000[Institutional research profile]{ref}
With <Denis Auroux>, he wrote lectures connecting <Lefschetz pencils>, <branched covers> and symplectic invariants. A <Lefschetz pencil> describes a manifold by a family of surfaces with controlled singular members; blowing up the base points produces a fibration. The approach makes a global geometric object accessible through fibres, singularities and the way the fibres fit together.<Lefschetz pencils, branched covers and symplectic invariants by Denis Auroux and Ivan Smith>[Abstract and sections 1–2, local models and base-point blowup]{ref}
\Image[https://www.maths.cam.ac.uk/files/styles/portrait/public/portraits/is200.jpg?itok=fjRhHiwP]
{title=Ivan Smith}
{description=Portrait identified by the Cambridge mathematics profile.}
{source=https://www.maths.cam.ac.uk/person/is200/1000}
{width=220}
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