Ben Grimmer

@profgrimmer.bsky.social

531 Followers 249 Following

Assistant Professor @JohnsHopkinsAMS, Works in Mathematical Optimization, Mostly here to share pretty maths/3D prints, sometimes sharing my research

5 circles with yarn between them representing non-crossing partitions and their duals
A 7x7 Shelf full of plastic balls 3D printed, depicting induced matrix norm balls for varied values of p and q.
A 7x7 shelf of unit balls in different norms. 3D printed
Two collections of norm balls, OWL norms and their duals shown in two rows on shelves in Benjamin Grimmer's office
Performance plot showing SPGM is competitive with BFGS
Trajectory of SPGM on a quadratic. It solves exactly!
Trajectory of OGM on a quadratic, its very slow
Photos of max-cut sdp approximations for 3x3 matrices, showing an inner approximation, the true polyhedron, and the sdp outer approximation