The HADES seminar on Tuesday, **September 19th** will be at **3:30pm** in **Room 740**.

**Speaker: **Ovidiu-Neculai Avadanei

**Abstract: **We consider the well-posedness of the generalized surface quasi-geostrophic (gSQG) front equation. In the present paper, by making use of the null structure of the equation, we carry out a paradifferential normal form analysis in order to obtain balanced energy estimates, which allows us to prove the low regularity local well-posedness of the g-SQG front equation in the non-periodic case at a low level of regularity (in the SQG case, it is only one half of a derivative above scaling). In addition, we establish global well-posedness theory for small and localized rough initial data, as well as modified scattering, by using the testing by wave packet approach of Ifrim-Tataru.

This is joint work with Albert Ai.