André Weil

André Weil (1906–1998) was a French mathematician whose work unified number theory, algebraic geometry, and topology through the lens of abstract structure. A founding member of the Bourbaki group, Weil introduced the adele ring with Claude Chevalley as a tool for global number theory, proved the Weil conjectures that connected the topology of algebraic varieties to their arithmetic over finite fields, and developed the foundations of modern algebraic geometry that would later be extended by Grothendieck. His conjectures, proved by Pierre Deligne, established a deep analogy between the Riemann hypothesis for curves over finite fields and the classical Riemann hypothesis — an analogy that remains one of the most productive structural correspondences in mathematics.