‘We care about geometric shapes, like curves and surfaces, but we use the tools that come from algebra to study them,’ says algebraic geometer Diletta Martinelli about her field of research. She joined the Korteweg-de Vries Institute for Mathematics at the University of Amsterdam in the fall of 2019. ‘For example, if you consider the circle, you have a geometric object that is defined by the algebraic equation x2 + y2=1. This is a simple example of the interplay between algebra and geometry.’