The structure and growth of Hochschild (co)homology

This project will combine methods from commutative algebra, representation theory and rational homotopy theory to improve our understanding of Hochschild homology and cohomology, especially the open problem of determining their growth. At the project's core is the deep interplay between Hochschild cohomology and the cotangent complex, a bridge that will be exploited in both directions. I will use techniques pioneered in his solution of Vasconcelos' conjecture, which were further developed in my work with Iyengar to drastically improve our knowledge on the cotangent complex. Concretely, the first objective is to show that non-complete intersection rings exhibit exponential growth in their Hochschild homology