Leírás
Enumerative geometry counts the number of geometric objects satisfying some given conditions. Classically these problems are considered over the complex field, where the answer is a single number, independent of the generic configuration. Over other fields, the answer depends on the generic configuration, and a complete list of possible solutions is known only in sporadic cases.
Over the reals, one can obtain a signed count of the solutions using topological methods, thus also a lower bound to the number of solutions. These topological methods have been recently extended to the algebraic category, also called refined enumerative geometry. In this talk I will discuss a special class of enumerative problems called Schubert calculus in the context of Chow-Witt rings. This is work in progress, joint with Thomas Hudson and Matthias Wendt.
https://zoom.us/j/93470816177?pwd=bjM4M0RQOUlNR0p1a2RqQnFjNWdFUT09
Meeting ID: 934 7081 6177
Passcode: 789355