In the fall of 2017, Mehtaab Sawhney, then an undergraduate at the Massachusetts Institute of Technology, joined a graduate reading group that set out to study a single paper over a semester. But by ...

Subspace codes are a class of error-correcting codes defined over the set of subspaces of a finite vector space. They have emerged as a powerful tool in network coding, where information is ...

We simplify the negative solution to the invariant subspace problem for Banach spaces. Developing the ideas of Read, we give an explicit example of a continuous linear operator on the Banach space l₁ ...