Helene Esnault (Freie Universitat Berline and IAS)
I’ll give our definition of them, in analogy to Simpson's bialgebraicity notion over the complex numbers, explain what special properties they have, and mention some corollaries (notably hard...
Margaret Bilu (Courant Institute of Mathematical Sciences (NYU), Mathematics)
For rings, there is a natural bijection between (two-sided) ideals and congruences, but for semirings (where we do not require additive inverses), this correspondence breaks. Many basic notions...
Jordan Ellenberg (University of Wisconsin-Madison)