Vladimir Arnold's work ranges from the very abstract (cohomology ring of the colored braid group, symplectic topology, Maslov Index, real algebraic geometry, invariants of plane curves,...) to the applied (stability of the solar system & Arnold diffusion, Cat map, singularity theory,...) and very applied (gömböc, book on Huygens & Barrow, Newton & Hooke,...). Admittedly, his work forms a continuum, but of wide breadth.
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